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Fans clamor for autographs from Downey, Jr. – a.k.a., the Iron Man – in Beverly Hills. Plus: Britney Spears, Beyoncé & Jay-Z and more

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LIFE OF THE PARTY

She (briefly) joined him onstage – and now she's right by his side! Beyoncé and Jay-Z host a bash following the rapper's Madison Square Garden concert at his club, 40/40, Tuesday in New York. And the newlyweds didn't waste much time posing, hitting the dance floor as New Edition's "Cool It Now" played.

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