Rihanna, Chris Brown, Katy Perry and Kanye are taking the stage at Z100's Jingle Ball 2008 -- and "Extra" is hooking up a friend with swag from the all-star concert!

One "Extra" friend will receive win an official H&M artist gift bag, packed with goodies from Canon, Soda Club USA, Duracell, Dooney & Burke, Paris Hilton, NY Health and Racquet Club, Mizani Hair Care, MGA Entertainment BRATZ Holiday Dolls, Hasbro Games, D'annunzio Group International and BlackBerry -- valued at $4,000! The swag is being handed out by "Extra" and On 3 Productions.

Sign up to become an "Extra" friend -- and all this swag could be yours!