20. Rihanna - Stay
Singer Rihanna performs live on stage as part of her 777 tour at The Forum on November 19, 2012 in London, England.
19. Taylor Swift - I Knew You Were Trouble
TORONTO, ON - JUNE 16: Taylor Swift arrives on the red carpet at the 2013 MuchMusic Video Awards at Bell Media Headquarters on June 16, 2013 in Toronto, Canada. (Photo by Jag Gundu/Getty Images)
18. Britney Spears - Ooh La La
at a taping of We Will Always Love You: A GRAMMY Salute To Whitney Houston on October 11, 2012 at the Nokia Theatre L.A. LIVE in Los Angeles, California. The show airs November 16, 2012.
17. Ke$ha - Crazy Kids
arrives at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California.
16. Bruno Mars - Treasure
performs onstage at the 54th Annual GRAMMY Awards held at Staples Center on February 12, 2012 in Los Angeles, California.
15. Rihanna & David Guetta - Right Now
LOS ANGELES, CA - APRIL 7: Recording artist Rihanna attends a game between the Los Angeles Clippers and the Los Angeles Lakers at Staples Center on April 7, 2013 in Los Angeles, California. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and/or using this Photograph, user is consenting to the terms and conditions of the Getty Images License Agreement. Mandatory Copyright Notice: Copyright 2013 NBAE (Photo by Andrew D. Bernstein/NBAE via Getty Images)
14. Fall Out Boy - My Songs Know What You Did In The Dark
NEW YORK, NY - APRIL 12: (L-R) Drummer Andy Hurley, bassist Pete Wentz, vocalist/guitarist Patrick Stump and guitarist Joe Trohman of Fall Out Boy pose backstage after performing at iHeartRadio Theater on April 12, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images for iHeartRadio)
13. Ariana Grande - The Way
arrives at the 2013 MTV Movie Awards at Sony Pictures Studios on April 14, 2013 in Culver City, California.
11. 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)
10. 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)
9. Selena Gomez - Come & Get It
LAS VEGAS, NV - MAY 19: Singer Selena Gomez (C) performs during the 2013 Billboard Music Awards at the MGM Grand Garden Arena on May 19, 2013 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
8. 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)
7. Justin Timberlake - Mirrors
NEW YORK, NY - APRIL 23: Justin Timberlake attends the 2013 Time 100 Gala at Frederick P. Rose Hall, Jazz at Lincoln Center on April 23, 2013 in New York City. (Photo by Jamie McCarthy/Getty Images)
6. Calvin Harris & Ellie Goulding - Need Your Love
LOS ANGELES, CA - SEPTEMBER 06: DJ Calvin Harris poses in the press room during the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)
5. 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)
4. Miley Cyrus - We Can't Stop
LOS ANGELES, CA - JUNE 12: Miley Cyrus attends the New Myspace launch event on June 12, 2013 in Los Angeles, California. (Photo by Jason Kempin/Getty Images for Myspace)
3. Icona Pop - I Love It
MIAMI BEACH, FL - JUNE 29: Aino Jawo and Caroline Hjelt of Icona Pop pose in the Wonderwall Portrait Studio at the iHeartRadio Ultimate Pool Party Presented by VISIT FLORIDA at Fontainebleau's BleauLive in Miami featuring live performances by Pitbull, Ke$ha, Afrojack, Icona Pop, Krewella and Jason Derulo on June 29, 2013 in Miami Beach, Florida. (Photo by Christopher Polk/Getty Images for Clear Channel)
2. 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)
1. 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)