#20 Alexandra Stan - Mr. Saxobeat

Press Photo of Alexandra Stan (2011)

#19 Edward Maya - Stereo Love

Photo from Edward Maya's Myspace Page.

#18 Cee Lo Green - F**k You (Forget You)

LOS ANGELES, CA - JUNE 26: Singer Cee Lo Green performs onstage during the BET Awards '11 held at the Shrine Auditorium on June 26, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

#17 Jennifer Lopez + Pitbull - On the Floor

NEW YORK - SEPTEMBER 13: Jennifer Lopez and Pitbull attend a post VMA dinner at The Waverly Inn on September 13, 2009 in New York City. (Photo by Gabriela Maj/Getty Images)

#16 Tinie Tempah - Written In the Stars

PADDOCK WOOD, UNITED KINGDOM - JULY 03: Tinie Tempah performs at the Hop Farm festival at The Hop Farm on July 3, 2011 in Paddock Wood, England. (Photo by Stuart Wilson/Getty Images)

#15 Lady Gaga - The Edge of Glory

CHIBA, JAPAN - JUNE 25: Lady Gaga performs during the MTV Video Music Aid Japan at Makuhari Messe on June 25, 2011 in Chiba, Japan. (Photo by Koki Nagahama/Getty Images)

#14 Jeremih - Down On Me feat. 50 Cent

NEW YORK, NY - APRIL 15: Recording artist Jeremih performs at the 6th annual Jr. Smile Collection event at Espace on April 15, 2011 in New York City. (Photo by Jason Kempin/Getty Images)

#13 Rihanna - S&M

LOS ANGELES, CA - JUNE 28: Singer Rihanna performs at the Staples Center on June 28, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

#12 Rihanna - Man Down

LOS ANGELES, CA - JUNE 28: Singer Rihanna performs at the Staples Center on June 28, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

#11 Katy Perry - Last Friday Night (TGIF)

MELBOURNE, AUSTRALIA - APRIL 30: Singer Katy Perry attends the launch of her new fragrance 'Purr' at Myer, Bourke Street on April 30, 2011 in Melbourne, Australia. (Photo by Graham Denholm/Getty Images)

#10 Britney Spears - Till the World Ends

LAS VEGAS, NV - MAY 22: Singer Britney Spears performs during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for ABC)

#9 Ke$ha - Blow

LONDON, ENGLAND - JULY 02: Ke$ha performs live on stage during the second day of the Wireless Festival at Hyde Park on July 2, 2011 in London, England. (Photo by Jim Dyson/Getty Images)

#8 Enrique Iglesias - Dirty Dancer feat. Lil' Wayne and Usher

LOS ANGELES, CA - NOVEMBER 21: Singer Enrique Iglesias performs 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)

#7 Nicki Minaj - Super Bass

LOS ANGELES, CA - JUNE 26: Rapper Nicki Minaj accepts the Best Female Hip Hop Artist award onstage during the BET Awards '11 held at the Shrine Auditorium on June 26, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

#6 Lupe Fiasco - The Show Goes On

UNIVERSAL CITY, CA - JUNE 05: Singer Lupe Fiasco performs onstage during the 2011 MTV Movie Awards at Universal Studios' Gibson Amphitheatre on June 5, 2011 in Universal City, California. (Photo by Kevin Winter/Getty Images)

#5 Black Eyed Peas - Just Can't Get Enough

LONDON, ENGLAND - JULY 01: Fergie and apl.de.ap of The Black Eyed Peas perform live on stage during the first day of the Wireless Festival at Hyde Park on July 1, 2011 in London, England. (Photo by Jim Dyson/Getty Images)

#4 Katy Perry - E.T.

INDIO, CA - APRIL 15: Singer Katy Perry watches Sleigh Bells during Day 1 of the Coachella Valley Music & Arts Festival 2011 held at the Empire Polo Club on April 15, 2011 in Indio, California. (Photo by Charley Gallay/Getty Images)

#3 Adele - Rolling In the Deep

BERLIN, GERMANY - MARCH 24: Singer Adele attends the Echo Awards 2011 at Palais am Funkturm on March 24, 2011 in Berlin, Germany. (Photo by Sean Gallup/Getty Images)

#2 Pitbull - Give Me Everything feat. Ne-Yo

LAS VEGAS, NV - MAY 22: Rapper Pitbull performs during the 2011 Billboard Music Awards at the MGM Grand Garden Arena May 22, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for ABC)

#1 LMFAO - Party Rock Anthem

LONDON, ENGLAND - JUNE 12: Stefan Gordy (Redfoo) and Skyler Gordy (SkyBlu) of LMFAO attend the media room for the Capital Radio Summertime Ball 2011 at Wembley Stadium on June 12, 2011 in London, England. (Photo by Tim Whitby/Getty Images)