#25 Ed Sheeran "The A Team"

LONDON, ENGLAND - JUNE 04: Singer Ed Sheeran performs on stage during the Diamond Jubilee concert at Buckingham Palace on June 4, 2012 in London, England. For only the second time in its history the UK celebrates the Diamond Jubilee of a monarch. Her Majesty Queen Elizabeth II celebrates the 60th anniversary of her ascension to the throne. Thousands of well-wishers from around the world have flocked to London to witness the spectacle of the weekend?s celebrations. (Photo by Dan Kitwood/Getty Images)

#24 Grouplove "Tongue Tied"

BEVERLY HILLS, CA - JUNE 28: (L-R) Recording artists Ryan Rabin, Hannah Hooper, and Christian Zucconi of Grouplove perform during the 27th Annual ASCAP Film & Television Music Awards at The Beverly Hilton Hotel on June 28, 2012 in Beverly Hills, California. (Photo by Frederick M. Brown/Getty Images)

#23 Alex Clare - "Too Close"

Courtesy Universal Republic

#22 Train "50 Ways To Say Goodbye"

DAYTONA BEACH, FL - JULY 07: Singer Patrick Monahan of Train performs on stage prior to the NASCAR Sprint Cup Series Coke Zero 400 Powered by Coca-Cola at Daytona International Speedway on July 7, 2012 in Daytona Beach, Florida. (Photo by Todd Warshaw/Getty Images for NASCAR)

#21 Gavin DeGraw "Sweeter"

NEW YORK, NY - APRIL 18: Gavin DeGraw performs on stage during the 3rd annual Origins Rocks Earth Month concert at Webster Hall on April 18, 2012 in New York City. (Photo by D Dipasupil/Getty Images)

#20 Kelly Clarkson "Dark Side"

US singer Kelly Clarkson performs during the Pop Music Festival 2012 at Arena Anhembi in Sao Paulo, Brazil, on June 23, 2012. AFP PHOTO/Yasuyoshi CHIBA (Photo credit should read YASUYOSHI CHIBA/AFP/GettyImages)

#19 Phillip Phillips - "Home"

KANSAS CITY, MO - JULY 10: Phillip Phillips performs during the 83rd MLB All-Star Game at Kauffman Stadium on July 10, 2012 in Kansas City, Missouri. (Photo by Jonathan Daniel/Getty Images)

#18 Graffiti6 "Free"

NEW YORK - OCTOBER 18: Graffiti 6 performs at Rockwood Music Hall on October 18, 2010 in New York City. (Photo by Joe Kohen/Getty Images)

#17 Matchbox Twenty "She's So Mean"

NEW YORK, NY - JUNE 21: Kyle Cook of Matchbox Twenty perform at the gala opening of the new Mercedes-Benz Manhattan at Mercedes-Benz Manhattan on June 21, 2011 in New York City. (Photo by Mike Coppola/Getty Images for Mercedes-Benz)

#16 Katy Perry - "Part of Me"

LONDON, ENGLAND - JULY 03: Katy Perry attends the European Premiere of 'Katy Perry Part Of Me' at Empire Leicester Square on July 3, 2012 in London, England. (Photo by Ian Gavan/Getty Images)

#15 Train - "Drive By"

POINT PLEASANT BEACH, NJ - MAY 25: Singer Patrick Monahan of Train performs during the 15th Annual WPLJ Summer Blast-Off at Jenkinsons On The Boardwalk on May 25, 2012 in Point Pleasant Beach, New Jersey. (Photo by Michael Loccisano/Getty Images)

#14 Demi Lovato - "Give Your Heart A Break"

NEW YORK, NY - JULY 06: Singer Demi Lovato performs on ABC's "Good Morning America" at Rumsey Playfield, Central Park on July 6, 2012 in New York City. (Photo by Stephen Lovekin/Getty Images)

#13 Ellie Goulding - "Lights"

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)

#12 .fun w Janelle Monae - "We Are Young"

UNIVERSAL CITY, CA - JUNE 03: Singer Nate Ruess of Fun. performs onstage during the 2012 MTV Movie Awards held at Gibson Amphitheatre on June 3, 2012 in Universal City, California. (Photo by Kevin Winter/Getty Images)

#11 One Direction - "What Makes You Beautiful"

(FILES) A file picture taken on April 21, 2012 in Wellington shows (RtoL) Zayn Malik, Liam Payne, Niall Horan, Louis Tomlinson and Harry Styles of the British-Irish boy band One Direction performing during the group's concert at the St James theatre. One Direction to dethrone Justin Bieber in the heart of the teenagers, signs the big return of boys band, these groups invented to seduce the girls who had been all the rage in the 90's. Liam, Harry, Zayn, Niall and Louis have between 18 and 20 years, are beautiful and appropriate on them and sing some sweet pop. AFP PHOTO / MARTY MELVILLE (Photo credit should read Marty Melville/AFP/GettyImages)

#10 Junior Doctor "Uh Oh"

#09 Neon Trees - "Everybody Talks"

NEW YORK, NY - APRIL 18: Chris Allen, Elaine Bradley, Tyler Glenn, and Branden Campbell of Neon Trees pose with fuse host/ musician Mark Hoppus (center right) at a taping of fuse's "Hoppus on Music" at fuse Studios on April 18, 2012 in New York City. (Photo by Cindy Ord/Getty Images)

#08 Katy Perry - "Wide Awake"

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

#07 Adele - "Rumour Has It"

British singer-songwriter Adele celebrates with the British Album of the Year award for her album "21" at the BRIT Awards 2012 in London on February 21, 2012. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)

#06 Carrie Underwood - "Good Girl"

NASHVILLE, TN - JUNE 08: Carrie Underwood performs during the 2012 CMA Music Festival - Day 2 at LP Field on June 8, 2012 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images)

#05 Karmin - "Broken Hearted"

HOLMDEL, NJ - MAY 20: Amy Heidemann of Karmin performs onstage at 103.5 KTU's KTUphoria at PNC Bank Arts Center on May 20, 2012 in Holmdel City, New Jersey. (Photo by Brian Ach/Getty Images)

#04 Maroon 5 w/ Wiz Khalifa "Payphone"

NEW YORK, NY - JUNE 29: Singer Adam Levine of Maroon 5 performs on NBC's "Today" at Rockefeller Plaza on June 29, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

#03 The Wanted - "Glad You Came"

BIRMINGHAM, ENGLAND - JUNE 30: Nathan Sykes of Chart-topping boy band The Wanted performs at the London 2012 Olympic Torch Relay Special City Celebration at Canon Hill Park Birmingham, presented by Coca-Cola at Cannon Hill Park on June 30, 2012 in Birmingham, England. (Photo by Shirlaine Forrest/Getty Images for Coca-Cola)

#02 Gotye - "Somebody That I Used To Know"

INDIO, CA - APRIL 15: Musician Wouter "Wally" De Backer aka Gotye performs during Day 3 of the 2012 Coachella Valley Music & Arts Festival held at the Empire Polo Club on April 15, 2012 in Indio, California. (Photo by Michael Buckner/Getty Images for Coachella)

#01 Carly Rae Jepsen - "Call Me Maybe"

TORONTO, ON - JUNE 17: Carly Rae Jepsen arrives at the 2012 MuchMusic Video Awards at MuchMusic HQ on June 17, 2012 in Toronto, Canada. (Photo by Jag Gundu/Getty Images)