

#25 -- The Fray's "How to Save a Life. Pianist and singer Isaac Slade of The Fray performs on stage after the medal ceremonies at the Vancouver 2010 Winter Olympics on Feb. 23 in Whistler, British Columbia. Michael Kappeler/AFP/Getty Images/Newscom
#24 -- Owl City's "Fireflies." Adam Young from the band Owl City performs during Jingle Ball 2009 at Madison Square Garden in New York City. Newscom
#23 -- Kings of Leon's "Use Somebody." Recording artists Kings of Leon perform on NBC's 'Today' show at Rockefeller Center on July 31, 2009 in New York City. Newscom
#22 -- Lady Gaga's "Bad Romance." Lady Gaga performs at Radio City Music Hall on Jan. 20 in New York City. Evan Agostini/AP
#21 -- Journey's "Don't Stop Believin'." Guitarist Neal Schon plays at Seminole HardRock Hotel and Casino in Hollywood, Fla., in September. Johnny Louis/WENN.com/Newscom
#20 -- Miley Cyrus's "Party in the USA." Singer and Actress Miley Cyrus performs at The Palace in Auburn Hill. Ricardo Thomas/The Detroit News/Newscom
# 19 -- 'Right Round.' Rapper Flo Rida appears on NBC's 'Today' Show Toyota Concert Series at Rockefeller Plaza in August 2009 in New York City. Newscom
#18 -- Plain White T's 'Hey There Delilah.' Plain White T's put on a show at Jingle Ball at the Bank Atlantic Center in Fort Lauderdale, Fla., in December 2007. Newscom/FILE
#17 -- T.I.'s 'Live Your Life.' At the American Airlines Arena in Miami, Fla., T.I. performs at the T.I. Live Your Life Concert with T.I. & Friends in February 2009. Johnny Louis/WENN.com/Newscom
#16 -- Kanye West's 'Stronger.' Artist Kanye West participates in MTV and ServiceNation's 'Be the Change: Live from the Inaugural,' on Jan. 20, 2009 in Washington. WENN.com/Newscom
#15 -- Katy Perry's 'Hot N Cold.' Perry sings at The Palladium in Hollywood, Calif., on Aug. 29, 2009. Debbie VanStory/ iPhotoLive.com/Newscom
#14 -- Beyonce's 'Single Ladies.' Beyonce performs in concert in Sao Paulo, Brazil, on Feb. 6 as part of her first Brazilian tour. Nelson Antoine/AP
#13 -- Katy Perry's 'I Kissed a Girl.' Perry performs at the V Festival in Staffordshire, England, in August 2009. Newscom
#12 -- Pink's 'So What.' Pink performing at the Koenig Pilsener Arena in Oberhausen, Germany in November 2009. Newscom
#11 -- Rihanna's 'Disturbia.' Rihanna puts on a concert at the Pepsi Fan Jam in Miami Beach which was broadcast live on VH1 on Feb. 4. Newscom
#10 -- Ke$ha's 'TiK ToK.' Singer Ke$ha performing on MuchMusic's 'MuchOnDemand' television show out of Toronto, Ontario on Jan. 18. Dominic Chan/WENN.com/Newscom
#9 -- Leona Lewis's 'Bleeding Love.' Leona Lewis sings during the TV show 'Wetten Dass...?' hosted by Thomas Gottschalk at the AWD Dome in Bremen, Germany, in May 2009. Newscom
#8 -- Taylor Swift's 'Love Story.' Swift performs at Sony's booth at the Consumer Electronics Show (CES) in Las Vegas, Nev., on Jan. 6. Paul Sakuma/AP
#7 -- Flo Rida's 'Low.' Flo Rida performs at the B94 Summer Blast Concert held at Soldiers & Sailors Memorial Hall in December 2009. Jason L Nelson/AdMedia/Newscom
#6 -- Lady Gaga's 'Just Dance.' In Vancouver, Canada, Lady Gaga performs in the first of three sold-out shows in December. Newscom
#5 -- Coldplay's 'Viva La Vida.' Chris Martin from the band Coldplay performs in Singapore as part of their 'Viva La Vida' tour in March 2009. Vivek Prakash/Reuters
#4 -- Jason Mraz's 'I'm Yours.' Jason Mraz sings at the Cricket Wireless Amphitheatre in Chula Vista in October 2009. Newscom
#3 -- The Black Eyed Peas's 'Boom Boom Pow.' From left, The Black Eyed Peas members Taboo, will.i.am, apl.de.ap, and Fergie are seen onstage at the annual Pre-Grammy Gala presented by The Recording Academy and Clive Davis on Jan. 30, 2010 at the Beverly Hilton in Beverly Hills, Calif. Vince Bucci/AP
#2 -- Lady Gaga's 'Poker Face.' Lady Gaga accepts the award for Best International breakthrough act at the 30th Brit Awards ceremony at Earl's Court in London, on Feb. 16. Suzanne Plunkett/Reuters
#1 -- The Black Eyed Peas's 'I Gotta Feeling.' The Black Eyed Peas perform at Madison Square Garden in New York City on Feb. 24. Jason DeCrow/AP