Other celebs who showed up or performed included Jay-Z, James Taylor, Kelly Clarkson and Katy Perry.

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Screenplay by James Cameron and Jay Cocks.

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Friendly with LeBron James and a number of sports superstars, Jay-Z could quickly make Roc Nation a force in the agency field.

WSJ: As Jay-Z sells, Nets losing minor owner, big name

This elite group of tech moguls, hedge-funders, athletes and entertainers is hovering under billionaire status with a strong chance of breaking into the Forbes 400 ranks this decade, including some well-known names such as Jay-Z, Jerry Seinfeld, Tiger Woods and James Cameron.

FORBES: The Forbes 400

Detroit musician James Yancey also known as J Dilla and Jay Dee was one of the music industry's most influential hip-hop artists, working for big-name acts like De La Soul, Busta Rhymes and Common.

NPR: Hip-Hop Producer, Rapper Jay Dee AKA J Dilla