Whether stars were hard at work or off on vacation, they had fun this week. Jessica Alba played with a doll at a fashion show, while Nick Lachey and Vanessa Minnillo rung in his birthday. Jessica and Ashlee Simpson launched their new clothing line, and Whitney Port caught rays in Cabo — click through to see all the pics, and don't forget to follow PopSugar on Twitter for exciting news and photos!
The Week's Most Fun and Funny Celebrity Twitter Pictures!
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