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)
19. Flo Rida/Sia - Wild Ones
(Photo by Ryan Pierse/Getty Images)
MELBOURNE, AUSTRALIA - APRIL 15: Musician Flo Rida arrives at the 2012 Logie Awards at the Crown Palladium on April 15, 2012 in Melbourne, Australia. (Photo by Ryan Pierse/Getty Images)
18. Nicki Minaj - Superbass
(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)
17. B.o.B/Taylor Swift - Both Of Us
(Photo by Neilson Barnard/Getty Images)
NEW YORK, NY - MARCH 01: Musician B.O.B visits SiriusXM Studios on March 1, 2012 in New York City. (Photo by Neilson Barnard/Getty Images)
16. 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)
15. Jay-Z/Kanye West - In Paris
(Photo by Kevin Winter/Getty Images)
LOS ANGELES, CA - AUGUST 28: Rappers Jay-Z (L) and Kanye West perform onstage during the 2011 MTV Video Music Awards at Nokia Theatre L.A. LIVE on August 28, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
14. Wiz Khalifa - Work Hard, Play Hard
(Photo by 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)
13. David Guetta/Sia - Titanium
(Photo credit should read 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)
12. Rihanna/Drake - 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)
11. One Direction - What Makes You Beautiful
(Photo by Chris Hyde/Getty Images)
BRISBANE, AUSTRALIA - APRIL 18: Niall Horan, Zayn Malik, Liam Payne, Harry Styles and Louis Tomlinson of One Direction perform on stage at The Brisbane Convention and Exhibition Centre on April 18, 2012 in Brisbane, Australia. (Photo by Chris Hyde/Getty Images)
10. Nicki Minaj - Starships
(Photo by Danny Martindale/Getty Images)
LONDON, ENGLAND - JULY 07: Nicki Minaj performs at Barclaycard Wireless Festival at Hyde Park on July 7, 2012 in London, England. (Photo by Danny Martindale/Getty Images)
9. Havana Brown - We Run The Night
(Photo by Alphonso Chan/Getty Images)
SINGAPORE - SEPTEMBER 26: Havana Brown performs on stage on the third and final day of the three day F1 Rocks Singapore concert at Fort Canning Park on September 26, 2009 in Singapore. (Photo by Alphonso Chan/Getty Images)
8. Chris Brown - Strip
(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)
7. Fun. - We Are Young
(Photo by 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)
6. Drake/Lil Wayne - The Motto
(Photo by 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)
5. Kirko Bangz - Drank In My Cup
4. Maroon 5 - Payphone
(Photo by Christopher Polk/Getty Images for Vh1)
INDIANAPOLIS, IN - FEBRUARY 02: Singer Adam Levine performs onstage during VH1's Super Bowl Fan Jam at Indiana State Fairgrounds, Pepsi Coliseum on February 2, 2012 in Indianapolis, Indiana. (Photo by Christopher Polk/Getty Images for Vh1)
3. Gotye - 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)
2. Carly Rae Jepsen - Call Me Maybe
(Photo by 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)
1. Rihanna - Where Have You Been
(Photo by Kevin Winter/Getty Images)
LOS ANGELES, CA - MAY 10: Actress/singer Rihanna arrives at the premiere of Universal Pictures' "Battleship" at Nokia Theatre L.A. Live on May 10, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
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