#20 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 Christopher Polk/Getty Images For BET)

#19 Nero - Promises

INDIO, CA - APRIL 15: DJs Joe Ray and Daniel Stephens of Nero perform onstage at the 2012 Coachella Valley Music & Arts Festival held at The Empire Polo Field on April 15, 2012 in Indio, California. (Photo by Mark Davis/Getty Images for Coachella)

#18 Owl City & Carly Rae Jepsen - Good Time

LOS ANGELES, CA - JULY 18: Musician Adam Young of Owl City performs at the Greek Theatre on July 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

#17 Nicki Minaj - Pound The Alarm

CARSON, CA - MAY 12: Singer Nicki Minaj 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)

#16 Demi Lovato - Give Your Heart A Break

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

#15 Cher Lloyd - Want U Back

attends/performs at Barclaycard Wireless Festival at Hyde Park on July 8, 2012 in London, England.

#14 Justin Bieber - As Long As You Love Me

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)

#13 The Wanted - Chasing The Sun

LONDON, ENGLAND - JULY 27: (L-R) Nathan Sykes, Tom Parker, Max George, Siva Kaneswaran and Jay McGuiness of the Wanted attend Nickelodeon joins Let's Move for 'Let's Move London' event at the American Ambassadors Residence, Winfield House, Regents Park on July 27, 2012 in London, England. (Photo by Simon Burchell/Getty Images for Nickelodeon)

#12 Pink - 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)

#11 Gotye - Somebody That I Used To Know

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)

#10 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)

#9 Carly Rae Jepsen - Call Me Maybe

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

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

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)

#7 Flo Rida - Whistle

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)

#6 Usher - Scream

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

#5 Havana Brown - We Run The Night ft. Pitbull

NEWARK, NJ - JULY 18: America's Got Talent Contestant Havana Brown attends an "America's Got Talent" Post Show Red Carpet New at Jersey Performing Arts Center on July 18, 2012 in Newark, New Jersey. (Photo by Michael Loccisano/Getty Images)

#4 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)

#3 Ellie Goulding - Lights

NEW YORK, NY - JANUARY 19: Singer Ellie Goulding performs during JetBlue's Live From T5 Concert Series Presents at JFK Airport on January 19, 2012 in New York City. (Photo by Astrid Stawiarz/Getty Images)

#2 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)

#1 Katy Perry - Wide Awake

US singer Katy Perry arrives for the European Premiere of her latest film 'Part of Me 3D', at Leicester Square in London on July 3, 2012. AFP PHOTO / MAX NASH (Photo credit should read MAX NASH/AFP/GettyImages)