#20 Gotye - Somebody That I Used To Know

SYDNEY, AUSTRALIA - AUGUST 10: Australian musician Gotye receives a 2012 ARIA Chart Award at The Ivy on August 10, 2012 in Sydney, Australia. (Photo by Lisa Maree Williams/Getty Images)

#19 Chris Brown - Don't Wake Me Up

LOS ANGELES, CA - JULY 01: Singer Chris Brown 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)

#18 Nicki Minaj - Pound The Alarm

LOS ANGELES, CA - AUGUST 08: Singer Nicki Minaj performs at the Nokia Theatre L.A. Live on August 8, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

#17 Justin Bieber - Boyfriend

UNIVERSAL CITY, CA - JULY 22: Singer Justin Bieber arrives at the 2012 Teen Choice Awards at Gibson Amphitheatre on July 22, 2012 in Universal City, California. (Photo by Jason Merritt/Getty Images)

#16 Cher Lloyd - Want U Back

LONDON, ENGLAND - NOVEMBER 02: Cher Lloyd arrives for the 'Cosmopolitan Ultimate Women Of The Year Awards 2010' at Banqueting House on November 2, 2010 in London, England. (Photo by Gareth Cattermole/Getty Images)

#15 Carly Rae Jepsen - Call Me Maybe

UNIVERSAL CITY, CA - JULY 22: Singer Carly Rae Jepsen performs onstage during the 2012 Teen Choice Awards at Gibson Amphitheatre on July 22, 2012 in Universal City, California. (Photo by Kevin Winter/Getty Images)

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

SANTA MONICA, CA - AUGUST 06: Singer P!nk is announced as the newest face of COVERGIRL Cosmetics at Shutters On The Beach on August 6, 2012 in Santa Monica, California. (Photo by Angela Weiss/Getty Images)

#13 Nicky Minaj - Starships

Nicky Minaj poses in the press room after winning Best Rap/Hip-Hop Album and Artist Award during the 2011 American Music Awards at the Nokia Theatre L.A. Live on November 20, 2011 in Los Angeles, California.
AFP PHOTO / ADRIAN SANCHEZ-GONZALEZ (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)

#12 Don Omar ft. Lucenzo - Danza Kuduro

MIAMI GARDENS, FL - FEBRUARY 02: Singer Don Omar performs at the Pepsi Smash Super Bowl Fiesta Concert outside of Dolphin Stadium on February 2, 2007 in Miami Gardens, Florida. (Photo by Larry Marano/Getty Images for NFL)

#11 Flo Rida - Wild Ones ft. Sia

UNIVERSAL CITY, CA - JULY 22: Rapper Flo Rida performs onstage during the 2012 Teen Choice Awards at Gibson Amphitheatre on July 22, 2012 in Universal City, California. (Photo by Kevin Winter/Getty Images)

#10 Maroon 5 - Payphone ft. Wiz Khalifa

NEW YORK, NY - JUNE 29: Singer Adam Levine of Maroon 5 performs on NBC's "Today" at Rockefeller Plaza on June 29, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

#9 Demi Lovato - Give Your Heart A Break

LOS ANGELES, CA - JANUARY 11: Singer/Actress Demi Lovato arrives at the 2012 People's Choice Awards at Nokia Theatre L.A. Live on January 11, 2012 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images for PCA)

#8 Flo Rida - Whistle

NEW YORK, NY - JULY 06: Rapper/singer Flo Rida performs on NBC's "Today" at Rockefeller Plaza on July 6, 2012 in New York City. (Photo by Mike Coppola/Getty Images)

#7 Calvin Harris - Let's Go ft. Ne-Yo

CHELMSFORD, ENGLAND - AUGUST 22: Calvin Harris performs during Day two of V Festival 2010 on August 22, 2010 in Chelmsford, England. (Photo by Gareth Cattermole/Getty Images)

#6 Havana Brown - We Run The Night

SYDNEY, AUSTRALIA - NOVEMBER 20: DJ Havana Brown arrives at Singstar's Take 40 Stars of Summer party at the "PlayStation Mansion" on November 20, 2010 in Sydney, Australia. (Photo by Lisa Maree Williams/Getty Images)

#5 Usher - Scream

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)

#4 David Guetta - Titanium ft. Sia

French DJ David Guetta performs at the Arena in Treptow, Berlin, on July 8, 2012. AFP PHOTO / FREDERIC LAFARGUE (Photo credit should read FREDERIC LAFARGUE/AFP/GettyImages)

#3 Katy Perry - Wide Awake

LONDON, ENGLAND - JULY 03: Katy Perry attends the European Premiere of 'Katy Perry Part Of Me' at Empire Leicester Square on July 3, 2012 in London, England. (Photo by Ian Gavan/Getty Images)

#2 Ellie Goulding - Lights

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)

#1 Rihanna - Where Have You Been

LONDON, ENGLAND - JULY 08: Rihanna performs at Barclaycard Wireless Festival at Hyde Park on July 8, 2012 in London, England. (Photo by Danny Martindale/Getty Images)