#20 Wondergirls - Like Money ft. Akon

The Wondergirls, a K-pop band from South Korea, enter the stage before their performance at the Music Bank K-pop festival concert in Hong Kong on June 23, 2012. Various K-pop artists from South Korea are in Hong Kong to perform at the Music Bank World Tour that has included concerts in Tokyo and Paris. AFP PHOTO / Antony DICKSON (Photo credit should read ANTONY DICKSON/AFP/GettyImages)

#19 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)

#18 fun. - Some Nights

SANTA MONICA, CA - AUGUST 19: Singer Nate Ruess of the musical group Fun. performs onstage during the 2012 Do Something Awards at Barker Hangar on August 19, 2012 in Santa Monica, California. (Photo by Christopher Polk/Getty Images for VH1)

#17 Rihanna - Diamonds

LOS ANGELES, CA - SEPTEMBER 06: Singer Rihanna performs 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)

#16 Taylor Swift - We Are Never Ever Getting Back Together

Christopher Polk/Getty Images

LOS ANGELES, CA - SEPTEMBER 06: Singer Taylor Swift performs onstage during the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Christopher Polk/Getty Images)

#15 Katy Perry - Wide Awake

YOSHIKAZU TSUNO/AFP/Getty Images

US singer and actress Katy Perry gestures to Japanese fans upon her arrival at the Japanese premiere of her movie "Katy Perry: Part of Me 3D" at a Tokyo theatre on September 25, 2012. Perry is now here to promote the film. AFP PHOTO / Yoshikazu TSUNO (Photo credit should read YOSHIKAZU TSUNO/AFP/GettyImages)

#14 Owl City & Carly Rae Jepsen - Good Time

NEW YORK, NY - AUGUST 25: Singer-songwriter Adam Young of Owl City (R) and recording artist Carly Rae Jepsen (L) perform during Arthur Ashe Kids' Day prior to the start of the 2012 U.S. Open at the USTA Billie Jean King National Tennis Center on August 25, 2012 in the Flushing neighborhood, of the Queens borough of New York City. (Photo by Mike Stobe/Getty Images for USTA)

#13 Usher - Numb

LOS ANGELES, CA - JULY 01: Recording Artist Usher performs onstage during the 2012 BET Awards at The Shrine Auditorium on July 1, 2012 in Los Angeles, California. (Photo by Michael Buckner/Getty Images For BET)

#12 Ke$ha - Die Young

LOS ANGELES, CA - SEPTEMBER 06: Singer Ke$ha arrives at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)

#11 Flo Rida - Whistle

BERLIN, GERMANY - SEPTEMBER 20: Flo Rida performs on stage during the Popstars Live Final Show on September 20, 2012 in Berlin, Germany. (Photo by Luca Teuchmann/Getty Images)

#10 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)

#9 Alex Clare - Too Close

#8 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)

#7 Kanye West - Mercy ft. Big Sean, Pusha T

LOS ANGELES, CA - MAY 12: Kim Kardashian and Kanye West talk from their courtside seats before the Los Angeles Lakers take on the Denver Nuggets in Game Seven of the Western Conference Quarterfinals in the 2012 NBA Playoffs on May 12, 2012 at Staples Center in Los Angeles, California. (Photo by Noel Vasquez/Getty Images)

#6 Ellie Goulding - Lights

Photo by Michael Buckner/Getty Images

HOLLYWOOD, CA - APRIL 11: Singer Ellie Goulding performs at the Third Annual ELLE Women In Music Event at Avalon on April 11, 2012 in Hollywood, California. (Photo by Michael Buckner/Getty Images)

#5 Justin Bieber - As Long As You Love Me

LAS VEGAS, NV - SEPTEMBER 30: Singer Justin Bieber performs at the MGM Grand Garden Arena as he tours in support of his new album, "Believe" on September 30, 2012 in Las Vegas, Nevada. (Photo by Bryan Steffy/Getty Images)

#4 Nicki Minaj - Pound The Alarm

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)

#3 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)

#2 P!nk - Blow Me (One Last Kiss)

NEW YORK, NY - SEPTEMBER 18: Pink performs onstage on NBC's "Today" at Rockefeller Plaza on September 18, 2012 in New York City. (Photo by Roger Kisby/Getty Images)

#1 Psy - Gangnam Style

SUWON, SOUTH KOREA - SEPTEMBER 25: Singer Psy performs onstage at Kyunggi University on September 25, 2012 in Suwon, South Korea. (Photo by Chung Sung-Jun/Getty Images)