#20 Macklemore & Ryan Lewis - Thrift Shop f/ Wanz

#19 Calvin Harris - Sweet Nothing f/ Florence Welch

LAS VEGAS, NV - SEPTEMBER 22: DJ Calvin Harris performs onstage during the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 22, 2012 in Las Vegas, Nevada. (Photo by Isaac Brekken/Getty Images for Clear Channel)

#18 The Wanted - I Found You

LOS ANGELES, CA - SEPTEMBER 06: (L-R) Singers Jay McGuiness, Siva Kaneswaran, Nathan Sykes, Max George and Tom Parker of the musical group The Wanted arrive at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Christopher Polk/Getty Images)

#17 FUN. - Some Nights

LONDON, UNITED KINGDOM - OCTOBER 07: Naye Ruess, Adrew Dost and Jack Antonoff of 'Fun' attend the BBC Radio 1 Teen Awards on October 7, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

#16 Nicki Minaj - Va Va Voom

NEW YORK, NY - SEPTEMBER 24: Nicki Minaj attends the Nicki Minaj "Pink Friday" Fragrance Launch Event at Macy's Herald Square on September 24, 2012 in New York City. (Photo by Dave Kotinsky/Getty Images)

#15 Flo Rida - Whistle

PASADENA, CA - SEPTEMBER 16: Rapper Flo Rida performs onstage at the 2012 NCLR ALMA Awards at Pasadena Civic Auditorium on September 16, 2012 in Pasadena, California. (Photo by Kevin Winter/Getty Images for NCLR)

#14 Justin Bieber - Beauty And A Beat f/ Nicki Minaj

MINNEAPOLIS, MN - OCTOBER 20: Justin Bieber performs at Target Center on October 20, 2012 in Minneapolis, Minnesota. (Photo by Adam Bettcher/Getty Images)

#13 Swedish House Mafia - Don't You Worry Child

LOS ANGELES, CA - NOVEMBER 21: Swedish House Mafia perform onstage during the 2010 American Music Awards held at Nokia Theatre L.A. Live on November 21, 2010 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images for DCP)

#12 Bruno Mars - Locked Out Of Heaven

NEW YORK, NY - APRIL 03: Bruno Mars performs during the 2012 Concert for the Rainforest Fund at Carnegie Hall on April 3, 2012 in New York City. (Photo by Jamie McCarthy/Getty Images)

#11 Pink - Blow Me (One Last Kiss)

MELBOURNE, AUSTRALIA - OCTOBER 04: Singer 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. (Photo by Scott Barbour/Getty Images)

#10 Enrique Iglesias - Finally Found You f/ Sammy Adams

LOS ANGELES, CA - AUGUST 16: Singer Enrique Iglesias performs at The Staples Center on August 16, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

#9 Alex Clare - Too Close

#8 Justin Bieber - As Long As You Love Me

MINNEAPOLIS, MN - OCTOBER 20: Justin Bieber performs at Target Center on October 20, 2012 in Minneapolis, Minnesota. (Photo by Adam Bettcher/Getty Images)

#7 Flo Rida - I Cry

PASADENA, CA - SEPTEMBER 16: Singer Flo Rida performs onstage at the 2012 NCLR ALMA Awards at Pasadena Civic Auditorium on September 16, 2012 in Pasadena, California. (Photo by Kevin Winter/Getty Images for NCLR)

#6 Ke$ha - Die Young

BEVERLY HILLS, CA - MARCH 24: Ke$ha attends the 26th Genesis Awards held at The Beverly Hilton Hotel on March 24, 2012 in Beverly Hills, California. (Photo by Jason Merritt/Getty Images for The Humane Society)

#5 Psy - Gangnam Style

LAS VEGAS, NV - OCTOBER 21: Psy performs at the Hard Rock Hotel & Casino during Rehab, the resort's weekly pool party, on October 21, 2012 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)

#4 Rihanna - Diamonds

LONDON, ENGLAND - SEPTEMBER 09: Singer Rihanna performs during the closing ceremony on day 11 of the London 2012 Paralympic Games at Olympic Stadium on September 9, 2012 in London, England. (Photo by Peter Macdiarmid/Getty Images)

#3 Maroon 5 - One More Night

SINGAPORE - SEPTEMBER 22: Maroon 5 performs during the 2012 F1 Singapore on September 22, 2012 in Singapore. (Photo by Chris McGrath/Getty Images)

#2 Chris Brown - Don't Wake Me Up

LOS ANGELES, CA - SEPTEMBER 06: Singer Chris Brown accepts the award for Best Male Video onstage during the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

#1 Ne-Yo - Let Me Love You

NEW YORK, NY - SEPTEMBER 20: Ne-Yo performs at The Alliance for Veteran Support 2nd Annual Initiative Honoring Veterans Community at Intrepid Sea-Air-Space Museum on September 20, 2012 in New York City. (Photo by Jason Kempin/Getty Images)