Lively stays in step as her fashionable alter ego on the N.Y. set of Gossip Girl. Plus: Ashlee Simpson-Wentz, Michelle Williams and more

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OFF THE CHAIN

A stylin' Kevin Federline is living large in Las Vegas! Before hitting the casinos, earlier in the day K-Fed spent time at TAO Beach club with his brother Chris, hanging out in a posh, private cabana and sipping pricey Patrón tequila.