This week, Amanda Bynes made some crazy faces all over Twitter, while Victoria Beckham and Kourtney Kardashian used the social network to share photos from their respective birthday bashes.
Plus, which star got a nasty sun burn on her back? Click the gallery above to find out!
Also, be sure to check out Rose McGowan's bikini bod, Katherine Heigl and Mariah Carey's adorable kids, Henry Winkler's look-alike son and Ashton Kutcher's tribute to Boston.
All these and more in this week's Best Celebrity TwitPics!
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