#25 Outasight "Tonight Is The Night"
OTTAWA, ON - JANUARY 29: Singer Outasight performs before the 2012 Tim Hortons NHL All-Star Game at Scotiabank Place on January 29, 2012 in Ottawa, Ontario, Canada. (Photo by Gregory Shamus/Getty Images)
#24 Adele "Someone Like You"
LONDON, ENGLAND - FEBRUARY 21: Adele attends The BRIT Awards 2012 at the O2 Arena on February 21, 2012 in London, England. (Photo by Gareth Cattermole/Getty Images)
#23 Scars on 45 "Heart on Fire"
#22 Johan Mayer "Shadow Days"
LAS VEGAS, NV - APRIL 30: Recording artist John Mayer performs during Tiger Jam 2011 at the Mandalay Bay Events Center April 30, 2011 in Las Vegas, Nevada. The event benefits the Tiger Woods Foundation. (Photo by Ethan Miller/Getty Images)(Photo by Ethan Miller/Getty Images)
#21 Colbie Caillat "Brighter Than The Sun"
MIAMI, FL - DECEMBER 01: Colbie Caillat performs the Tiffany & Co. and Camila Alves' preview of the 2011-2012 Blue Book Collection and AD Oasis at The Raleigh on December 1, 2011 in Miami, Florida. (Photo by Rodrigo Varela/Getty Images for Architectural Digest)
#20 Katy Perry "The One That Got Away"
LOS ANGELES, CA - FEBRUARY 12: Singers Rihanna and Katy Perry in the audience at the 54th Annual GRAMMY Awards held at Staples Center on February 12, 2012 in Los Angeles, California. (Photo by Larry Busacca/Getty Images For The Recording Academy)
#19 Jason Mraz "I Won't Give Up"
Jason Mraz (L) gestures while posing on arrival for the 2012 MusiCares Person of the Year Tribute honouring Paul McCartney as Person of the Year on February 10, 2012 in Los Angeles, California. The MusiCares Person of the Year tribute is one of the most prestigious events held during Grammy Week ahead of the 54th Annual Grammy Awards on February 12. AFP PHOTO / Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
#18 Cobra Starship w/ Sabi "You Make Me Feel So..."
NEW YORK, NY - FEBRUARY 16: Gabe Saporta, Victoria Asher and Alex Suarez of Cobra Starship Cobra Starship perform at the American Express Cardmember-Only Show with Tommy Hilfiger featuring Cobra Starship at Lincoln Center on February 16, 2012 in New York City. (Photo by Ben Gabbe/Getty Images for American Express)
#17 Selena Gomez and the Scene "Love You Like A Love Song"
LOS ANGELES, CA - FEBRUARY 24: Actress Selena Gomez attends the Fifth Annual Women In Film Pre-Oscar Cocktail Party at Cecconi's Restaurant on February 24, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)
#16 Gavin DeGraw "Not Over You"
COLUMBIA, MD - AUGUST 24: Gavin DeGraws performs during his first concert since being assaulted in New York City on August 8th, at Merriweather Post Pavillion on August 24, 2011 in Columbia, Maryland. This is DeGraw's first concert after being injured during an incident near the National Underground, a bar and live venue that he owns with his brother in New York City, in the early hours of August 8, 2011. (Photo by Kris Connor/Getty Images)
#15 Hot Chelle Rae w/ New Boyz "I Like It Like That"
HONOLULU, HI - JANUARY 29: Singer Ryan Follese of Hot Chelle Rae performs during the pre-game show of the 2012 NFL Pro Bowl at Aloha Stadium on January 29, 2012 in Honolulu, Hawaii. (Photo by Kent Nishimura/Getty Images)
#14 Gotye "Somebody That I Used To Know"
MAITLAND, AUSTRALIA - MAY 07: Wally De Backer of Gotye performs on stage at the Groovin The Moo Festival on May 7, 2011 in Maitland, Australia. (Photo by Mark Metcalfe/Getty Images)
#13 Christina Perri "A Thousand Years"
CHICAGO, IL - NOVEMBER 08: Christina Perri attends "The Twilight Saga: Breaking Dawn: Part 1" Concert Tour at the House Of Blues Chicago on November 8, 2011 in Chicago, Illinois. (Photo by Timothy Hiatt/Getty Images)
#12 Maroon 5 w/ Christina Aguilera "Moves Like Jagger"
CHICAGO, IL - MARCH 01: Maroon 5 performs Escape To Total Rewards at Union Station on March 1, 2012 in Chicago, Illinois. (Photo by Daniel Boczarski/Getty Images for Caesars Entertainment)
#11 Bruno Mars "It Will Rain"
US singer Bruno Mars performs live on stage during the BRIT Awards 2012 in London on February 21, 2012. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
#10 Lady Antebellum "Just A Kiss"
LOS ANGELES, CA - MARCH 06: (L-R) Hillary Scott, Charles Kelley,of Lady Antebellum perform at Oreo Cookies 100th Birthday Celebration with a special performance by Lady Antebellum at The Grove on March 6, 2012 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
#09 Matt Nathanson w/ Sugarland "Run"
LOS ANGELES, CA - MAY 12: Singer Matt Nathanson performs at the 53rd Annual NARM Convention Awards Dinner on May 12, 2011 in Los Angeles, California. (Photo by Valerie Macon/Getty Images)
#08 David Guetta w/ Usher "Without You"
LOS ANGELES, CA - FEBRUARY 12: DJ David Guetta and singer Chris Brown perform 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)
#07 Rihanna w/ Calvin Harris "We Found Love"
Barbadian singer Rhianna performs during the BRIT Awards 2012 in London on February 21, 2012. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)LEON NEAL/AFP/Getty Images
#06 Adele "Set Fire To The Rain"
LONDON, ENGLAND - FEBRUARY 21: Adele onstage at The Brit Awards 2012 at The O2 Arena on February 21, 2012 in London, England. (Photo by Dave J Hogan/Getty Images)
#05 Katy Perry "The One That Got Away"
US singer Katy Perry smiles upon arrival prior to the start of Chanel fashion designer Germany's Karl Lagerfeld Fall/Winter 2012-2013 ready-to-wear collection show, on March 6, 2012 at the Grand Palais in Paris. AFP PHOTO/ALEXANDER KLEIN (Photo credit should read ALEXANDER KLEIN/AFP/Getty Images)
#04 Train "Drive By"
LAS VEGAS, NV - OCTOBER 29: Train singer Pat Monahan (C) performs with audience members at the Andre Agassi Foundation for Education's 16th Grand Slam for Children benefit concert at the Wynn Las Vegas October 29, 2011 in Las Vegas, Nevada. The event raises funds to help improve education for underserved youth in the Las Vegas community. (Photo by Ethan Miller/Getty Images)
#03 Coldplay "Paradise"
LOS ANGELES, CA - FEBRUARY 12: Musician Chris Martin of Coldplay performs onstage at the 54th Annual GRAMMY Awards held at Staples Center on February 12, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
#02 Jessie J "Domino"
SYDNEY, AUSTRALIA - MARCH 09: Jessie J performs on stage at the launch of Nova's Red Room on March 9, 2012 in Sydney, Australia. (Photo by Mark Metcalfe/Getty Images)
#01 Kelly Clarkson "Stronger (What Doesn't Kill You)"
Kelly Clarkson performs at the Staples Center during the 54th Grammy Awards in Los Angeles, California, February 12, 2012. AFP PHOTO Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)