Britney Spears joins the X Factor USA
judging panel, American Pie: Reunion
star Jason Biggs and Jenny Mollen send up the latest Time magazine breastfeeding cover
, and Made in Chelsea
's Millie Mackintosh shows off her revealing swimsuit - we take a look at the best celebrity tweets of the week...
Made in Chelsea's Millie Mackintosh shows off her swimwear on twitter.
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Copyright: Twitter Millie Mackintosh/Twitter