Jason Nevins

with Run–D.M.C.

with MIKA, Stephen Schwartz, Priscilla Renea, Mathieu Jomphe Lépine, Ariana Grande

with Madonna

with Britney Spears

with Britney Spears

with Mariah Carey

with Janet Jackson

with Justin Timberlake, Beyoncé

with Britney Spears

with Jennifer Hudson

with Britney Spears

with Madonna

with Madonna

with Madonna

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Britney Spears

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Christina Aguilera

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Britney Spears, Christina Aguilera, Daniel Merriweather, Jennifer Hudson, Jordin Sparks, Kelly Clarkson, Chris Brown, P!nk, Kelly Rowland, Madcon, Scouting For Girls, USHER, Groove Armada, Justin Timberlake, Metro Station, Gramma Funk, Timbaland, Sound Selektaz, Total Control, Bass Force, Marc JB, Lee Dagger AKA Bimbo Jones, DJ Puddy, The Count, Lenny B, Ty Sunderland, Luke Solomon, Adam Lambert, Alicia Keys, CLMD, Gossip, Katy B, Little Mix, Miike Snow, Rebecca Ferguson, Rita Ora, Sia, Various Artists, Alexandra Burke, Cher Lloyd, Chip, JLS, Magnetic Man, Mark Ronson, The Script, The Business Intl, A$AP Rocky, DEV, Flo Rida, John Legend, Mike Posner, will.i.am

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson

with Kelly Clarkson