Fergie perform at Conde Nast’s Fashion Rocks concert in New York at Radio City Music Hall.

Jennifer Hudson, Joel Perry

Alicia Keys, Carlos Santana

Terri Hatcher, Mark Badgley, left, and James Mischka

Steven Tyler, Fergie

Fashion Rocks host Jeremy Piven

Maroon 5

Violinist Miri Ben-Ari

Ashlee Simpson kisses designer Max Azria

Avril Lavigne

Jessica Alba

Ciara

Jeremy Piven

Martina McBride

Jennifer Lopez

Carrie Underwood

LL Cool J and Tyra Banks

Fergie

Mischa Barton

50 Cent, Terri Hatcher

Tommy Hilfiger, Mischa Barton

Tyra Banks

Ashanti