Blair and 5-month-old son Arthur laugh it up in Beverly Hills. Plus: Russell Brand, Rihanna, Katy Perry and more
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Updated: Tuesday Jan 17, 2012 | 05:00 PM EST
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Just hours after wowing fans with Angelina Jolie at the Golden Globes, Brad Pitt gets back to work in L.A. on Monday, signing autographs for fans while promoting Moneyball.
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