WEST HOLLYWOOD, California — On Saturday night at the Key Club, the Roots held their annual Grammy all-star jam session. And while in previous years a plethora of well-known performers like Common and Erykah Badu got down with the group, this time around the Illy Philly funksters had the star in attendance — Tom Cruise.

Hollywood's Top Gun didn't get onstage, but he did take in the sounds of hip-hop's top band and of his friend Jada Pinkett-Smith.

Smith, dressed in a Baltimore thug-style black hoodie and jeans that surely made Tupac look down from heaven and crack a smile, started the night off early by leading her band, Wicked Wisdom, in a rowdy punk-rock-flavored set.

Either Jada really loves rocking the mic, or she had her acting skills working for her, because she bobbed her head and flailed her arms like a seasoned rock star. After her show, the petite performer chilled with Tommy C.

When the Roots took the stage, they kept the night moving with a medley of covers of old-school jams and their own ditties, like "Star."

"Introducin' the band you gotta see to believe," rapped Black Thought. "He got the mic in his hand, so keep the heat up your sleeve/ It's Black Thought, he rockin' sharp so the speakers'll bleed/ I run a triathlon, you wouldn't see me

  "Whatever Happened To Fiona Apple? Online Campaign Tries To Find Out". On the big night, February 8, be sure to tune in to MTV at 7 p.m. for our "All up in the Grammys" preshow. Plus check out videos of the nominees and more right here on mtv.com.

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