#20 One Direction - Na Na Na

Photo by Stephen Lovekin/Getty Images

NEW YORK, NY - MAY 23: (Left to right) Singers Zayn Malik, Harry Styles, Liam Payne, Louis Tomlinson, and Niall Horan of One Direction attend the "Men In Black 3" New York Premiere after party at the USS Intrepid on May 23, 2012 in New York City. (Photo by Stephen Lovekin/Getty Images)

#19 Marina and the Diamonds - Primadonna

Photo by Adam Berry/Getty Images

BERLIN, GERMANY - JANUARY 20: Marina and the Diamonds perform during Michalsky StyleNite at Mercedes-Benz Fashion Week Berlin at Tempodrom on January 20, 2012 in Berlin, Germany. (Photo by Adam Berry/Getty Images)

#18 Cher Lloyd - Want U Back

Photo by Gareth Cattermole/Getty Images

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)

#17 Justin Bieber - Boyfriend

Photo by Vittorio Zunino Celotto/Getty Images

MILAN, ITALY - JUNE 02: Justin Bieber performs at Alcatraz on June 2, 2012 in Milan, Italy. (Photo by Vittorio Zunino Celotto/Getty Images)

#16 Fun. - We Are Young ft. Janelle Monae

Photo by Kevin Winter/Getty Images

UNIVERSAL CITY, CA - JUNE 01: Singer Nate Ruess of Fun (L) and singer Janelle Monae perform at rehearsals for the 2012 MTV Movie Awards on June 1, 2012 in Universal City, California. (Photo by Kevin Winter/Getty Images)

#15 One Direction - What Makes You Beautiful

Photo by Neilson Barnard/Getty Images

NEW YORK, NY - MAY 26: (L-R) Louis Tomlinson, Harry Styles, Liam Payne, Zayn Malik and Niall Horan of British boy band One Direction perform live on stage at the Beacon Theatre on May 26, 2012 in New York City. (Photo by Neilson Barnard/Getty Images)

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

Photo by Gareth Cattermole/Getty Images

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)

# 13 Young Jeezy - Leave You Alone ft. Ne-Yo

Photo by Frazer Harrison/Getty Images

LOS ANGELES, CA - FEBRUARY 08: Rapper Young Jeezy arrives at the 51st Annual Grammy Awards held at the Staples Center on February 8, 2009 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)

#12 Katy Perry - Wide Awake

Photo by ROBYN BECK/AFP/GettyImages

Singer Katy Perry performs on Hollywood Boulevard before the premiere of her film "Katy Perry: Part Of Me" at Grauman's Chinese Theatre in Hollywood, California, on June 26, 2012. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)

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

Photo by Frederick M. Brown/Getty Images

HOLLYWOOD, CA - JUNE 07: Actress Havana Brown attends The (RED) RUSH Games Party at Avalon Hollywood on June 7, 2012 in Hollywood, California. (Photo by Frederick M. Brown/Getty Images)

#10 The Wanted - Chasing The Sun

Photo by Frazer Harrison/Getty Images for ABC

LAS VEGAS, NV - MAY 20: (L-R) Nathan Sykes, Jay McGuiness, Siva Kaneswaran, Tom Parker and Max George of The Wanted arrive 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)

#9 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)

#8 David Guetta - Titanium ft. Sia

Photo by Jason Merritt/Getty Images

LOS ANGELES, CA - FEBRUARY 12: DJ David Guetta performs onstage at the 54th Annual GRAMMY Awards held at Staples Center on February 12, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

#7 Flo Rida- Wild Ones ft. Sia

Photo by Frederick M. Brown/Getty Images

SANTA MONICA, CA - FEBRUARY 18: Recording artist Flo Rida performs during the 2nd Annual Cartoon Network Hall of Game Awards at the Barker Hangar, Santa Monica Airport on February 18, 2012 in Santa Monica, California. (Photo by Frederick M. Brown/Getty Images)

#6 Usher - Scream

Photo by Ethan Miller/Getty Images

LAS VEGAS, NV - NOVEMBER 10: Singer Usher arrives at the 12th annual Latin GRAMMY Awards at the Mandalay Bay Resort & Casino on November 10, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

#5 Nicki Minaj - Starships

Photo by Kevork Djansezian/Getty Images

LOS ANGELES, CA - NOVEMBER 20: Singer Nicki Minaj performs onstage at the 2011 American Music Awards held at Nokia Theatre L.A. LIVE on November 20, 2011 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)

#4 Gotye - Somebody That I Used To Know

Photo by Brendon Thorne/Getty Images

SYDNEY, AUSTRALIA - MAY 28: Wally De Backer arrives at the 2012 APRA Music Awards at the Sydney Convention & Exhibition Centre on May 28, 2012 in Sydney, Australia. (Photo by Brendon Thorne/Getty Images)

#3 Maroon 5 - Payphone ft. Wiz Khalifa

Photo by Andrew H. Walker/Getty Images

NEW YORK, NY - NOVEMBER 09: Musicians Jesse Carmichael,James Valentine, Adam Levine, Mickey Madden and Matt Flynn of the group Maroon 5 attend the 2011 Victoria's Secret Fashion Show at the Lexington Avenue Armory on November 9, 2011 in New York City. (Photo by Andrew H. Walker/Getty Images)

#2 Carly Rae Jepsen - Call Me Maybe

Photo by Kevin Winter/Getty Images

HOLLYWOOD, CA - JUNE 26: Singer Carly Rae Jepsen arrives at the premiere of "Katy Perry: Part Of Me" at Grauman's Chinese Theatre on June 26, 2012 in Hollywood, California. The premiere also included a special live performance by Katy for the first-ever Pepsi/Billboard Summer Beats series. "Katy Perry: Part Of Me" will be released by Paramount's Insurge Pictures on July 5, 2012. (Photo by Kevin Winter/Getty Images)

#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)