20. Tyga - Rack City

Bennett Raglin/Getty Images

NEW YORK, NY - DECEMBER 31: Recording artist Tyga visits BET's "106 & Party" at BET Studios on December 16, 2011 in New York City. (Photo by Bennett Raglin/Getty Images)

19. LMFAO - Sexy And I Know It

Christopher Polk/Getty Images

INDIANAPOLIS, IN - FEBRUARY 05: LMFAO member Redfoo performs during the Bridgestone Super Bowl XLVI Halftime Show at Lucas Oil Stadium on February 5, 2012 in Indianapolis, Indiana. (Photo by Christopher Polk/Getty Images)

18. Gym Class Heroes/Adam Levine - Stereo Hearts

Kevin Winter/Getty Images

CARSON, CA - MAY 12: Singer Travie McCoy of Gym Class Heroes performs at 102.7 KIIS FM's Wango Tango at The Home Depot Center on May 12, 2012 in Carson, California. (Photo by Kevin Winter/Getty Images)

17. DJ Khaled - I'm On One

Kevin Winter/Getty Images

LOS ANGELES, CA - JUNE 26: Rapper DJ Khaled performs onstage during the BET Awards '11 held at the Shrine Auditorium on June 26, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

16. Calvin Harris/Ne-Yo - Let's Go

Tim Whitby/Getty Images

LONDON, ENGLAND - DECEMBER 03: Calvin Harris attends day one of Jingle Bell Ball at O2 Arena on December 3, 2011 in London, England. (Photo by Tim Whitby/Getty Images)

15. B.o.B/Taylor Swift - Both Of Us

Kevin Winter/Getty Images

CARSON, CA - MAY 12: Singer B.o.B. performs at 102.7 KIIS FM's Wango Tango at The Home Depot Center on May 12, 2012 in Carson, California. (Photo by Kevin Winter/Getty Images)

14. Chris Brown - Strip

Michael Buckner/Getty Images

HOLLYWOOD - AUGUST 04: Singer Chris Brown arrives at the premiere of Screen Gems' "Takers" at the Arclight Cinerama Dome on August 4, 2010 in Hollywood, California. (Photo by Michael Buckner/Getty Images)

13. Pitbull/Chris Brown - International Love

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. Drake/Lil Wayne - The Motto

Ronald Martinez/Getty Images

ORLANDO, FL - FEBRUARY 26: Hip-hop artists Lil' Wayne and Drake (L) sit courtside during the 2012 NBA All-Star Game at the Amway Center on February 26, 2012 in Orlando, Florida. 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. (Photo by Ronald Martinez/Getty Images)

11. David Guetta/Sia - Titanium

JENS KALAENE/AFP/Getty Images

French DJ David Guetta poses with the 2012 Echo Music Award in the category 'Club/Dance National/International' in the press room after the Echo Awards ceremony in Berlin on March 22, 2012. The German music award granted every year by the Deutsche Phono academy awards prizes in 27 categories. AFP PHOTO / JENS KALAENE - - GERMANY OUT - - (Photo credit should read JENS KALAENE/AFP/Getty Images)

10. Wiz Khalifa - Work Hard Play Hard

Kevin Winter/Getty Images

UNIVERSAL CITY, CA - JUNE 03: Rapper Wiz Khalifa performs onstage during the 2012 MTV Movie Awards held at Gibson Amphitheatre on June 3, 2012 in Universal City, California. (Photo by Kevin Winter/Getty Images)

9. Fun. - We Are Young

Charles Eshelman/Getty Images for Spotify

NEW YORK, NY - NOVEMBER 30: (L-R) Andrew Dost, Nate Ruess and Jack Antonoff of the band Fun attend 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)

8. One Direction - What Makes You Beautiful

Neilson Barnard/Getty Images

NEW YORK, NY - MAY 26: Louis Tomlinson, Harry Styles, Liam Payne, Zayn Malik and Niall Horan of British boy band One Direction perform live on stage at the Beacon Theatre on May 26, 2012 in New York City. (Photo by Neilson Barnard/Getty Images)

7. Kirko Bangz - Drank In My Cup

6. Maroon 5 - Payphone

Kevin Winter/Getty Images

CARSON, CA - MAY 12: Singer Adam Levine of Maroon 5 performs at 102.7 KIIS FM's Wango Tango at The Home Depot Center on May 12, 2012 in Carson, California. (Photo by Kevin Winter/Getty Images)

5. Carly Rae Jepsen - Call Me Maybe

Frazer Harrison/Getty Images for ABC

LAS VEGAS, NV - MAY 20: Performer Carly Rae Jepsen poses in the press room 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)

4. Drake/Rihanna - Take Care

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)

3. Gotye - Somebody That I Used To Know

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)

2. Nicki Minaj - Starships

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)

1. Rihanna - Where Have You Been

John Shearer/Getty Images

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)