#20- Jason Aldean w/ Kelly Clarkson 'Don't You Wanna Stay'

NASHVILLE, TN - NOVEMBER 10: Jason Aldean and Kelly Clarkson perform "Dont You Wanna Stay" at the 44th Annual CMA Awards at the Bridgestone Arena on November 10, 2010 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images)

#19- Usher 'More'

LOS ANGELES, CA - FEBRUARY 13: Singer Usher performs onstage at The 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California. (Photo by Larry Busacca/Getty Images For The Recording Academy)

#18- Bruno Mars 'Just The Way You Are'

AUGSBURG, GERMANY - MARCH 19: Singer Bruno Mars performs on stage during the 'Wetten Dass ... ?' TV show at Augsburg fair ground on March 19, 2011 in Augsburg, Germany. (Photo by Johannes Simon/Getty Images)

#17- Avril Lavigne 'What The Hell'

NEW YORK, NY - MARCH 08: Avril Lavigne attends the release party for Avril Lavigne's new album "Goodbye Lullaby" at SL Lounge on March 8, 2011 in New York City. (Photo by D Dipasupil/Getty Images)

#16- Andy Grammer 'Keep Your Head Up'

#15- My Chemical Romance 'Sing'

LOS ANGELES, CA - MARCH 23: Singer Gerard Way from My Chemical Romance performs onstage during "Unstaged: An Original Series From American Express" with a performance by Duran Duran and directed by David Lynch, in partnership with VEVO and YouTube, held at The Mayan on March 23, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images for American Express)

#14- Usher 'DJ Got Us Fallin' In Love'

HOLLYWOOD - FEBRUARY 10: Usher performs at the (BELVEDERE) RED launches with Usher on February 10, 2011 in Hollywood, California. (Photo by Christopher Polk/Getty Images For Belvedere)

#13- Lady Gaga 'Born This Way'

DULUTH, GA - APRIL 18: (FOR EDITORIAL USE ONLY) Lady Gaga performs during The Monster Ball Tour at the Arena at Gwinnett Center on April 18, 2011 in Duluth, Georgia. (Photo by Rick Diamond/Getty Images)

#12- Neon Trees 'Animal'

LONDON, ENGLAND - FEBRUARY 21: (UK TABLOID NEWSPAPERS OUT) L-R Chris Allen and Tyler Glenn of Neon Trees perform for a Biz Session to promote their new album 'Habits' on February 21, 2011 in London, England. (Photo by Dave Hogan/Getty Images)

#11- Mike Posner 'Cooler Than Me'

ZURICH, SWITZERLAND - NOVEMBER 06: Mike Posner performs during the fourth day of the Charles Vogele Fashion Days on November 6, 2010 in Zurich, Switzerland. (Photo by The Image Gate/Getty Images for IMG)

#10- Pink 'Perfect'

BEVERLY HILLS, CA - MAY 01: Singers Pink (L) and Linda Perry (R) perform at the L.A. Gay & Lesbian Center's "An Evening With Women" on May 1, 2010 in Beverly Hills, California. (Photo by Valerie Macon/Getty Images)

#9- Taio Cruz 'Dynamite'

SANTA MONICA, CA - NOVEMBER 10: Singer/producer Taio Cruz performs onstage during the Grand Opening of Kenneth Cole Boutique at Santa Monica Place on November 10, 2010 in Santa Monica, California. (Photo by Michael Kovac/Getty Images for Kenneth Cole)

#8- Katy Perry 'E.T.'

MIRAMAR, CA - DECEMBER 03: Singer Katy Perry performs onstage during "VH1 Divas Salute the Troops" presented by the USO at the MCAS Miramar on December 3, 2010 in Miramar, California. "VH1 Divas Salute the Troops" concert event will be televised on Sunday, December 5 at 9:00 PM ET/PT on VH1. (Photo by Kevin Winter/Getty Images for VH1)

#7 Bruno Mars 'Grenade'

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

#6- Cee-Lo Green 'Forget You'

LONDON, ENGLAND - FEBRUARY 15: Cee Lo Green accepts the International Male Solo Artist on stage at the The BRIT Awards 2011 at O2 Arena on February 15, 2011 in London, England. (Photo by Dave J Hogan/Getty Images)

#5- The Script 'For The First Time'

BARCELONA, SPAIN - FEBRUARY 12: Singer Daniel O'Donoghue of the Irish band The Script peforms live during a concert at Razzmatazz on February 12, 2011 in Barcelona, Spain. (Photo by Javier Fernandez Del Corral/Getty Images)

#4- Plain White T's 'Rhythm of Love'

NEW YORK - AUGUST 18: (L-R) De'Mar Hamilton, Tom Higgenson, Tim Lopez, Dave Tirio and Mike Retondo of the Plain White T's perform during the benefit the VH1 Save The Music Foundation at Bowlmor Lanes on August 18, 2010 in New York City. (Photo by Astrid Stawiarz/Getty Images)

#3- Pink 'Raise Your Glass'

LOS ANGELES, CA - NOVEMBER 21: Singer Pink (L) 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)

#2- Adele 'Rolling In The Deep'

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

#1- Katy Perry 'Firework'

LOS ANGELES, CA - FEBRUARY 13: Signer Katy Perry performs onstage during The 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)