What to wear? Selena Gomez's 21 Coolest Casual Looks

Selena's 21 Best Street Style Moments Selena Gomez is finally celebrating her 21st birthday! To join in the fun we gathered up her top 21 coolest, hippest, most boho-fab fashion moments.

Take a look at our picks—do you have a favorite?
1. Bohemian Babe

2. Winter Coat

3. Blazing

4. Cardigan Cool

5. Short Shorts

6. Grunge Girl

7. Cozy Chic

8. Sweater Dress

9. Beach Bum

10. Fringe-tastic

11. Who Wears the Pants

12. Cropped

13. In the Army

14. Stone Washed

15. Ocean Play

16. Cut it Out

17. Shades of Gray

18. Colorful

19. Peace

20. Spring Sweetie

21. Biker Chick

Attention: Famous Hacker Victims (Party Two)

The Hacked
It seems like every month a new celebrity finds their pictures or contact information posted online for all to see. Here are a few famous victims of hacker attacks.

10. Julianne Hough
Julianne Hough was another victim of HollywoodLeaks, but this time nothing explicit was found. Instead a few bikini shots from her e-mail made their way online. It turns out ex-Mormons aren't big on nudie photos.

11. Miley Cyrus
Miley Cyrus has suffered at least two hacker attacks. At one point pictures from her e-mail account made their way online, and another time hackers posted images they found in her private MySpace account. While none of the pictures were explicit, they were controversial because of her age (15 at the time) and their risque nature.

12. Blake Lively
While Blake Lively has denied that it's her in a few nude pictures that leaked online, it's mostly thought that the images (which show her face and the fake tattoos she wore in The Town), are of her.

13. Lindsay Lohan
In 2007 someone got into Lindsay Lohan's Blackberry and her MySpace account. The photos leaked were nothing interesting, but the hacker also found and posted a series of embarassing e-mail messages between LiLo and Paris Hilton that fueled speculation that the two were feuding.

14. Kim Kardashian
When hackers got into Kim Kardashian's Twitter account, they didn't get any photos or info, they just posted a few bogus messages on her account.

15. Gwyneth Paltrow
Gwyneth Paltrow is one of the celebrities whose voice mail was hacked by British journalists during the News International phone hacking scandal.

16. Selena Gomez
After Selena Gomez started seeing Justin Bieber her Facebook account was hacked, and a malicious third party started posting mean things about her new boyfriend.

17. Jessica Alba
Jessica Alba is thought to be another famous victim of the same hacker ring that targeted Scarlett Johansson and Vanessa Hudgens.

Do You Know Good Girls with a Wild Side

Good Girls with a Wild Side
Even the sweetest celebs have a wild streak.

Good Girls Gone Bad
Even the sweetest celebrity ladies have a wild streak. Taylor Swift dated an older ladies' man, Selena Gomez got arrested (fine, just for a movie role), Anne Hathaway admitted she's done things she's not proud of, and more...

1. Taylor Swift
Taylor Swift doesn't go out drinking, she's rarely seen without a pretty dress, and she's best friends with fellow good girl Selena Gomez. That said, her dating life shows there's a little more to her than her ultra-innocent facade. For example, she dated John Mayer! Yes, the country cutie once dated the notorious ladies' man, who's 12 years older. It didn't end well, and her song, "Dear John," is thought by some to be about him.

2. Selena Gomez
"Wild" to Selena Gomez typically means making out with beau Justin Bieber at awards shows. However, she let loose on the set of Spring Breakers this year. The sweet starlet donned a bikini for most of the film, in which she plays a girl who drinks from a brown bag and gets arrested for robbing a restaurant! She said the role was unlike anything she's ever done. "That's why I took so many pictures! I was like ‘Why am I so excited to be arrested?' But, I was super excited," she said.

3. Emma Watson
Emma Watson is in the process of shaking her innocent Harry Potter image. Her next flick, Bling Ring, might just do the trick. The starlet parades around in short shorts and a bra top in the movie AND sports a tramp stamp. She really lets her (fake) hair down for the role. Plus, Watson seems to be getting a little wilder in her personal life, too. She was seen making out with her new man at Coachella!

4. Katy Perry
Believe it or not, Katy Perry was raised in a very religious household by her pastor parents. She grew up on gospel music and groomed her voice by singing at her church from the age of 9 to 17. When her mainstream music career took off, things changed. Her first hit single was called "I Kissed a Girl," after all. Since then, she's managed to create a candy-coated bad girl image, but claims she's still very much religious.

5. Anne Hathaway
You might think Anne Hathaway is as about as innocent as they come in Hollywood, but she says that's not so. "Lindsay Lohan and I have more in common than people think," she said in a 2012 interview. "It is just that I did stuff at college when nobody knew about it. I'm not a saint. I wasted time doing self-destructive things. I found out you can only dance on so many table tops," she added. In a 2007 interview, Hathaway admitted one of her favorite songs is Peaches' "F*** the Pain Away." Fierce!

6. Dakota Fanning
In real life, Dakota Fanning is sweet as pie. We doubt she's even said a four-letter word. But, the star loved acting out in The Twilight Saga: New Moon. “I think it’s more fun to play a bad person than a good person. She almost blows your mind how evil she is,” Fanning said in a 2009 interview.

7. Angelina Jolie
We know, Angelina Jolie made a name for herself as a Hollywood bad girl. But, a lot has happened since she walked around with a vial of Billy Bob Thorton's blood around her neck -- namely, six children and an engagement. However, the mom claims she still has a wild streak. “I’m still a bad girl,” she said in 2011. “I still have that side of me. It’s just in its place now. It belongs to Brad or it belongs to our adventures.”

8. Charlize Theron
Chalize Theron is gorgeous, yes. But a mean drunk who wants to steal her old high school boyfriend away from his wife? We highly doubt it. The actress did all that in Young Adult, however, and she kinda liked it. "This was the first time in my life I kind of relished this bad behavior," Theron admitted.

9. Jessica Simpson
Jessica Simpson has never really had a scandalous social life, unlike her blonde pop star peers. However, the mom-to-be is really, really good at giving too many details about her bedroom behavior. Even years before Simpson could tweet TMI snippets about what happens behind closed doors, John Mayer called her "sexual napalm." Plus, she posed nude while pregnant in 2012, which definitely counts as "wild side" in our books.

10. Elisabeth Moss
Elisabeth Moss' character Peggy gets a little wild and crazy on Mad Men occasionally, and Moss is that way in her personal life, too. She opened up about her ex-husband Fred Armisen in 2012 interview and perhaps said a bit too much. "I'm probably gonna get a slap on the wrist," she said of her biting comments. "But I've just been such a good girl. And sometimes you just want to be a bad girl for a minute."

Yes,21 Things You Don't Know About Selena Gomez(Party Three)

15. She's BFFs with Taylor Swift
Selena Gomez and Taylor Swift spend as much time together as their crazy schedules allow. The gals often do lunch and even bake cupcakes together! "We've been friends for four years and she has been through so much with me that I can say we're almost sisters," Swift said in a 2012 interview.

16. She Has Three Platinum Singles
Gomez decided to put her music career on the back burner in early 2012, but she's had a pretty successful run at pop stardom so far. She has three RIAA Platinum singles: "Naturally," "Who Says," and "Love You Like a Love Song." She also has three Gold albums.

17. She and Demi Lovato Go Way Back
Selena Gomez and Demi Lovato have a lot in common: They started on Barney and Friends, both have dated Jonas Brothers, they've starred in Disney Channel shows, and more. So over the years they've remained good friends. “I’m very lucky to have someone like her in my life," Lovato said in 2012.

18. She Was Linked to Taylor Lautner
Months before Taylor Lautner began dating Taylor Swift, the Twilight heartthrob was linked to Ms. Gomez. They were spotted together in Vancouver a few times in April 2009 but nothing ever came of the rumored romance. By October of that year, Lautner had cozied up to Ms. Swift.

19. She Turned Down 'High School Music 3'
Selena Gomez could have joined Ashley Tisdale and Zac Efron in HSM3, but she passed. "High School Musical 3 is cute, and I think it would be a great opportunity for someone else. But I passed on it because I didn’t want to do it. I plan to take other roles in acting that are challenging for me. After Disney, I want to be taken seriously as an actress for many years," she said in 2008.

20. She Voiced 90 Characters in One Movie
At 15, Gomez voiced 90 Whos in Horton Hears a Who, starring Jim Carrey and Steve Carrell. She played Carrell's daughters in the 2008 animated flick, but never actually got to meet the actor. "It was kind of a bummer!" she said. "But at the same time, it was cool. I can see him and say 'Hey, I played your daughter!'"

21. She Had to Learn Two British Accents
Gomez spent weeks learning two different British accents for her 2011 role in Monte Carlo. The actress played Grace in the flick, a girl who gets mistaken for a socialite while vacationing in Paris. "Accent training was the hardest thing on top of learning lines," she said.

Yes,21 Things You Don't Know About Selena Gomez(Party Two)

8. You Can Smell Like Her
Gomez launched her first fragrance, Selena, in 2012. She said: "I describe it as yummy. It’s romantic. It’s not over-bearing. Simple! My mom legitimately likes it." The actress also carefully picked out the tall bottle and its funky top.

9. She's a Do-Gooder
On top of starring in movies and making music and spending time with the Biebs, Gomez also gives back. She is the ambassador of DoSomething.org, advocates safe driving through State Farm, hosts an annual charity concert for UNICEF, and was named ambassador to the Ryan Seacrest Foundation in 2012.

10. She Made a Splash at the 2011 Oscars
After months and months of denying their pancake dates were anything more than a meal between friends, Gomez and fellow teen star Justin Bieber made their official debut as a couple at the 2011 Vanity Fair Oscars afterparty. The new couple wore color-coordinated ensembles on the red carpet and caused quite a commotion.

11. She Wants to Invent Pickle Gum
Selena Gomez just might have something in common with Snooki. She loves pickles! The starlet said in a past interview that she'd like to invent pickle-flavored chewing gum. Ick!

12. She Owns Six Dogs
Selena Gomez is mother to six rescue dogs! Her collection includes: Willie, Wallace, Fina, Chip, Chazz, and Baylor. She actually adopted Baylor, an adorable husky mix, while on a trip to Canada with Bieber. "We went to a shelter just for fun ... and we saw this adorable, adorable puppy," she explained. "I literally felt like he said my name. So, I had to have him."

13. She's the Youngest UNICEF Ambassador in History
In August 2009, 17-year-old Gomez became the youngest UNICEF ambassador ever. She traveled to Ghana with the organization for her first field mission. In 2011, the actress traveled to Chile to meet families in one of the organization's programs. "To witness first hand these families' struggles, and also their hope and perseverance, was truly inspiring," she said.

14. She was 'Waterpark Girl' in Her First Movie
Before she played Alex Russo, Gomez was credited as Waterpark Girl in 2003's Spy Kids 3-D: Game Over. She had a small role in Walker, Texas Ranger: Trial By Fire before getting her big Disney break in 2006. Fast forward a few years and the actress is starring alongside some of showbiz's biggest names. She will share the screen with James Franco in 2013's Spring Breakers.