20. Taylor Swift - 22
LAS VEGAS, NV - MAY 19: Taylor Swift arrives at the 2013 Billboard Music Awards at the MGM Grand Garden Arena on May 19, 2013 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
18. Taylor Swift - I Knew You Were Trouble
NEW YORK, NY - MAY 06: Taylor Swift attends the Costume Institute Gala for the "PUNK: Chaos to Couture" exhibition at the Metropolitan Museum of Art on May 6, 2013 in New York City. (Photo by Dimitrios Kambouris/Getty Images)
8. Zedd - Clarity
NEW YORK, NY - JANUARY 16: DJ Zedd performs at MTV's 2013 "Artists To Watch" Concert at Highline Ballroom on January 16, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images)
17. P!nk - Just Give Me A Reason
attends the St. John's Health Center's Power Of Pink benefiting The Margie Petersen Breast Center at Sony Studios on November 12, 2012 in Los Angeles, California.
11. Bruno Mars - Treasure
performs onstage at the 54th Annual GRAMMY Awards held at Staples Center on February 12, 2012 in Los Angeles, California.
15. Britney Spears - Ooh La La
at the premiere of Fox's "The X Factor" Season 2 and handprint ceremony at the Chinese Theatre on September 11, 2012 in Los Angeles, California.
17. Calvin Harris and Ellie Goulding - Need Your Love
HOLMDEL, NJ - MAY 20: DJ Calvin Harris spins 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)
10. Jason Derulo - The Otherside
LAS VEGAS, NV - MAY 19: Singer Jason Derulo arrives at the 2013 Billboard Music Awards at the MGM Grand Garden Arena on May 19, 2013 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)
16. Ke$ha - Crazy Kids
arrives at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California.
12. Macklemore - Same Love
MILWAUKEE, WI - MAY 12: Macklemore & Ryan Lewis perform during Yahoo! On The Road at Turner Hall on May 12, 2013 in Milwaukee, Wisconsin. (Photo by Timothy Hiatt/Getty Images)
11. Will. I. Am and Justin Bieber - #thatPower
SYDNEY, AUSTRALIA - JULY 18: Justin Bieber performs on stage during the 'Sunrise' broadcast at the Overseas Passenger Terminal on July 18, 2012 in Sydney, Australia. (Photo by Brendon Thorne/Getty Images)
14. Ariana Grande - The Way
arrives at the 2013 MTV Movie Awards at Sony Pictures Studios on April 14, 2013 in Culver City, California.
9. Mariah Carey - #beautiful
NEW YORK, NY - MAY 24: Singer Mariah Carey performs on ABC's "Good Morning America" at Rumsey Playfield on May 24, 2013 in New York City. (Photo by Andrew H. Walker/Getty Images)
6. Daft Punk - Get Lucky
LOS ANGELES, CA - DECEMBER 11: Musicians Thomas Bangalter and Guy-Manuel De Homem-Christo of Daft Punk arrives at Walt Disney's "TRON: Legacy" World Premiere held at the El Capitan Theatre on December 11, 2010 in Los Angeles, California. (Photo by John Sciulli/Getty Images)
4. Icona Pop - I Love It
LAS VEGAS, NV - MAY 19: Caroline Hjelt (L) and Aino Jawo of Icona Pop arrive at the 2013 Billboard Music Awards at the MGM Grand Garden Arena on May 19, 2013 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)
7. Justin Timberlake - Mirrors
NEW YORK, NY - JULY 18: Justin Timberlake attends the "Friends with Benefits" premiere at Ziegfeld Theater on July 18, 2011 in New York City. (Photo by Stephen Lovekin/Getty Images)
3. Selena Gomez - Come & Get It
LOS ANGELES, CA - APRIL 27: Actress/recording artist Selena Gomez performs during the 2013 Radio Disney Music Awards at the Nokia Theatre L.A. Live on April 27, 2013 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)
5. Fall Out Boy - My Songs Know What You Did In The Dark
LOS ANGELES, CA - NOVEMBER 21: Musicians Joseph Trohman, Patrick Stump, Pete Wentz and Andrew Hurley of the group Fallout Boy arrive at the 2006 American Music Awards held at the Shrine Auditorium on November 21, 2006 in Los Angeles, California. (Photo by Mark Mainz/Getty Images)
2. Macklemore - Can't Hold Us
NEW YORK, NY - MAY 20: Macklemore backstage at BET's "106 & Park" at BET Studios on May 20, 2013 in New York City. (Photo by Ilya S. Savenok/Getty Images for BET)
1. Robin Thicke - Blurred Lines
MANNHEIM, GERMANY - MAY 30: Singer Robin Thicke and the four finalists Sabrina Elsner (R), Luise Will (2ndL), Lovelyn Enebechi (2ndR) and Maike van Grieken (L) perform during the final of 'Germany's Next Top Model by Heidi Klum' TV show at SAP Arena on May 30, 2013 in Mannheim, Germany. (Photo by Thomas Lohnes/Getty Images)