Beyoncé, Mariah Top Fifth Annual Fashion Rocks Bill

By Jessica Gold Haralson

Tuesday July 22, 2008 02:35 PM EDT

Beyoncé Knowles

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It's Fashion Rocks's fifth anniversary – and organizers have assembled a glittering roster of performers to mark the occasion.

Beyoncé, Justin Timberlake and Mariah Carey are among the musical heavyweights expected to take the stage at the Sept. 5 concert at New York's Radio City Music Hall. Officially the beginning to Mercedes-Benz Fashion Week, the star-studded event will also feature celebrity presenters to be announced at a later date.

According to organizers, other scheduled performers include Rihanna, Fergie, Chris Brown, rapper Lil Wayne and Welsh soul singer Duffy.

The event, which will benefit Stand Up to Cancer, will also be recorded and broadcast on CBS on Sept. 9 (9 p.m. ET).