MTV Movie Awards: Backstage!

Go behind the scenes with Christina, Jessica, Justin and a host of other stars at the big event. By Serena Kappes and Julia Wang

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A slinky Christina Aguilera vamps it up during her performance of "Ain't No Other Man" at the MTV Movie Awards on Saturday in Culver City, Calif. The singer – who hosted an afterparty with pal Jessica Alba at L.A. club Privilege – will release her new album, Back to Basics, in August.