20. Kelly Clarkson- Catch My Breath

US singer Kelly Clarkson performs during the Pop Music Festival 2012 at Arena Anhembi in Sao Paulo, Brazil, on June 23, 2012. AFP PHOTO/Yasuyoshi CHIBA (Photo credit should read YASUYOSHI CHIBA/AFP/GettyImages)

19. Ne-Yo Let Me Love You

performs onstage during KIIS FM's 2012 Jingle Ball at Nokia Theatre L.A. Live on December 1, 2012 in Los Angeles, California.

18. Andy Grammer- Miss Me

<> at Central Park on August 27, 2012 in New York City.

14. Pink- Try

attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California.

16. The Script-Hall of Fame

poses in the press room during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada.

15. Taylor Swift- We Are Never Ever, Getting Back Together

performs onstage during KIIS FM's 2012 Jingle Ball at Nokia Theatre L.A. Live on December 1, 2012 in Los Angeles, California.

17. Pink- Blow Me One Last Kiss

Pink performs for fans at The Forum Theatre on October 4, 2012 in Melbourne, Australia. Pink is in Australia promoting her latest album, The Truth About Love.

13. Rihanna - Diamonds

<> on November 27, 2012 in Los Angeles, California.

12. Ke$ha- Die Young

<> at Rockefeller Plaza on November 20, 2012 in New York City.

11. Carrie Underwood- Blown Away

performs at Staples Center on October 16, 2012 in Los Angeles, California.

10. Chris Brown- Dont Wake Me Up

onstage at the 2011 American Music Awards held at Nokia Theatre L.A. LIVE on November 20, 2011 in Los Angeles, California.

9. Ed Sheeran- The A Team

CHELMSFORD, ENGLAND - AUGUST 18: Ed Sheeran performs on The Arena Stage on day 1 of the V Festival at Hylands Park on August 18, 2012 in Chelmsford, England. (Photo by Samir Hussein/Getty Images)

8. Adele-Skyfall

<> at 02 Arena on February 21, 2012 in London, England.

7. Justin Bieber- As Long As You Love Me

at The Staples Center on October 2, 2012 in Los Angeles, California.

6. The Lumineers- Ho Hey

<> at Paramount Studios on July 25, 2012 in Hollywood, California.

5. Train- 50 Ways To Say Goodbye

during the NFL International Series match between the New England Patriots and the St.Louis Rams at Wembley Stadium on October 28, 2012 in London, England.

4. Bruno Mars- Locked Out Of Heaven

Bruno Mars performs at the Staples Center during the 54th Grammy Awards in Los Angeles, California, February 12, 2012. AFP PHOTO Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

3. Alex Clare- Too Close

2. FUN- Some Nights

onstage at the MTV EMA's 2012 at Festhalle Frankfurt on November 11, 2012 in Frankfurt am Main, Germany.

1. Maroon 5- One More Night

attends Escape To Total Rewards at Union Station on March 1, 2012 in Chicago, Illinois.