
Adele —
Adele

Taylor Swift —
Taylor Swift

Rihanna —
Rihanna

John Legend —
John Legend

Wiz Khalifa, Amber Rose —
Wiz Khalifa, Amber Rose

Fergie —
Fergie

Miranda Lambert —
Miranda Lambert

OK Go —
OK Go

Nicki Minaj —
Nicki Minaj

Jessie J —
Jessie J

Skrillex —
Skrillex

Maroon 5 —
Maroon 5

Katy Perry —
Katy Perry

Foo Fighters —
Foo Fighters

LL Cool J —
LL Cool J

Blake Shelton —
Blake Shelton

Carrie Underwood —
Carrie Underwood

Tony Bennett —
Tony Bennett

Bruno Mars —
Bruno Mars

Kings of Leon —
Kings of Leon

Ledisi —
Ledisi

Esperanza Spalding —
Esperanza Spalding

Kathy Griffin —
Kathy Griffin

The Civil Wars —
The Civil Wars

Alicia Keys, Swizz Beatz —
Alicia Keys, Swizz Beatz

Foster the People —
Foster the People

David Guetta —
David Guetta

Rebecca Black —
Rebecca Black

Thompson Square —
Thompson Square

Alison Krauss and the Union Station —
Alison Krauss and the Union Station

Nicole "Snooki" Polizzi —
Nicole "Snooki" Polizzi

The Band Perry —
The Band Perry

Mumford & Sons —
Mumford & Sons