20. Wiz Khalifa/Snoop Dogg - Young, Wild, & Free

(Photo by Christopher Polk/Getty Images for Coachella)

INDIO, CA - APRIL 15: Rappers Snoop Dogg (L) and Wiz Khalifa perform onstage during day 3 of the 2012 Coachella Valley Music & Arts Festival at the Empire Polo Field on April 15, 2012 in Indio, California. (Photo by Christopher Polk/Getty Images for Coachella)

19. Drake/Rihanna - Take Care

(Photo by Jesse D. Garrabrant/NBAE via Getty Images)

LOS ANGELES, CA - FEBRUARY 20: Singer Rihanna and Rapper Drake perform during half-time during the 2011 NBA All-Star Game on February 20, 2011 at the Staples Center in Los Angeles, California. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and/or using this photograph, user is consenting to the terms and conditions of the Getty Images License Agreement. Mandatory Copyright Notice: Copyright 2011 NBAE (Photo by Jesse D. Garrabrant/NBAE via Getty Images)

18. Rihanna featuring Jay-Z - Talk That Talk

(Photo by Christopher Polk/Getty Images for Coachella)

INDIO, CA - APRIL 15: Singer Rihanna in the audience during day 3 of the 2012 Coachella Valley Music & Arts Festival at the Empire Polo Field on April 15, 2012 in Indio, California. (Photo by Christopher Polk/Getty Images for Coachella)

17. Chris Brown - Turn Up The Music

(Photo by Brendon Thorne/Getty Images)

SYDNEY, AUSTRALIA - APRIL 15: Chris Brown performs live on stage during Supafest 2012 at ANZ Stadium on April 15, 2012 in Sydney, Australia. (Photo by Brendon Thorne/Getty Images)

16. Jay-Z/Kanye West - In Paris

(Photo by Jason Kempin/Getty Images for You Tube)

NEW YORK, NY - MAY 02: Jay-Z attends YouTube 2012 Upfronts Presentation at Beacon Theatre on May 2, 2012 in New York City. (Photo by Jason Kempin/Getty Images for You Tube)

15. Maroon 5 featuring Wiz Khalifa - Payphone

(Photo by Patrick Smith/Getty Images)

BALTIMORE, MD - MAY 19: Performing artist Wiz Khalifa (R) sings a song with Maroon 5 lead vocalist and guitarist Adam Levine prior to the 137th running of the Preakness Stakes at Pimlico Race Course on May 19, 2012 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images)

14. Rihanna - Where Have You Been

(Photo by Mark Davis/Getty Images)

LOS ANGELES, CA - MAY 23: Singer Rihanna performs onstage during Fox's "American Idol 2012" results show at Nokia Theatre L.A. Live on May 23, 2012 in Los Angeles, California. (Photo by Mark Davis/Getty Images)

13. Pitbull - Back In Time

(Photo by David Becker/Getty Images)

LAS VEGAS, NV - MARCH 30: Armando 'Pitbull' Perez, winner of the BMI President's Award, performs during the 19th Annual BMI Latin Music Awards at the Encore Las Vegas on March 30, 2012 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)

12. Usher - Scream

(Photo by Frazer Harrison/Getty Images for ABC)

LAS VEGAS, NV - MAY 20: Singer Usher arrives at the 2012 Billboard Music Awards held at the MGM Grand Garden Arena on May 20, 2012 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images for ABC)

11. One Direction - What Makes You Beautiful

(Photo by John Shearer/Getty Images for KCA)

LOS ANGELES, CA - MARCH 31: Singers (L-R) Niall Horan, Liam Payne, Harry Styles, Zayn Malik, and Louis Tomlinson of One Direction arrive at Nickelodeon's 25th Annual Kids' Choice Awards held at Galen Center on March 31, 2012 in Los Angeles, California. (Photo by John Shearer/Getty Images for KCA)

10. Drake featuring Lil Wayne - The Motto

(Photo by Kevin Winter/Getty Images)

IRVINE, CA - MAY 08: Singer Drake performs at The Verizon Wireless Amphitheatre on May 8, 2012 in Irvine, California. (Photo by Kevin Winter/Getty Images)

9. Rihanna - Birthday Cake

(Photo by John Shearer/Getty Images for Entertainment Industry Foundation)

BEVERLY HILLS, CA - APRIL 18: Singer Rihanna performs onstage at the 15th Annual "An Unforgettable Evening" Benefiting EIF's Women's Cancer Research Fund held at The Beverly Hilton Hotel on April 18, 2012 in Beverly Hills, California. (Photo by John Shearer/Getty Images for Entertainment Industry Foundation)

8. Chris Brown/Pitbull - International Love

(Photo by Kevin Winter/Getty Images)

LOS ANGELES, CA - FEBRUARY 12: Singer Chris Brown performs onstage at the 54th Annual GRAMMY Awards held at Staples Center on February 12, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

7. The Wanted - Glad You Came

(Photo by Jerod Harris/Getty Images for Mixology 101)

LOS ANGELES, CA - APRIL 05: (L-R) Tom Parker, Nathan Sykes, Max George, Siva Kaneswaran, and Jay McGuiness of the band The Wanted arrive at the Planet Dailies And Mixology 101 Grand Opening held at Planet Dailies & Mixology 101 on April 5, 2012 in Los Angeles, California. (Photo by Jerod Harris/Getty Images for Mixology 101)

6. Kirko Bangz - Drank In My Cup

5. Justin Bieber - Boyfriend

(Photo by Kevork Djansezian/Getty Images)

LOS ANGELES, CA - MARCH 31: Singer Justin Bieber (R) accepts the Favorite Singer award onstage with host Will Smith at Nickelodeon's 25th Annual Kids' Choice Awards held at Galen Center on March 31, 2012 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)

4. Gotye featuring Kimbra - Somebody That I Used To Know

(Photo by Michael Buckner/Getty Images for Coachella)

INDIO, CA - APRIL 15: Musician Wouter "Wally" De Backer aka Gotye performs during Day 3 of the 2012 Coachella Valley Music & Arts Festival held at the Empire Polo Club on April 15, 2012 in Indio, California. (Photo by Michael Buckner/Getty Images for Coachella)

3. Nicki Minaj - Starships

(Photo by Danny Martindale/Getty Images)

LONDON, ENGLAND - APRIL 19: Nicki Minaj signs copies of her number one album 'Pink Friday: Roman Reloaded' at HMV Whiteleys on April 19, 2012 in London, England. (Photo by Danny Martindale/Getty Images)

2. Flo Rida featuring Sia - Wild Ones

(Photo by Mark Davis/Getty Images)

LOS ANGELES, CA - MAY 23: Rapper Flo Rida performs onstage during Fox's "American Idol 2012" results show at Nokia Theatre L.A. Live on May 23, 2012 in Los Angeles, California. (Photo by Mark Davis/Getty Images)

1. fun. - We Are Young

(Photo by Charles Eshelman/Getty Images for Spotify)

NEW YORK, NY - NOVEMBER 30: The band Fun.' singer Nate Ruess performs at Spotify knocks it out of the park at Stephen Weiss Studio on November 30, 2011 in New York City. (Photo by Charles Eshelman/Getty Images for Spotify)