This week, Aubrey O' Day shows off her assets in a low-cut bikini, Pauly D does his best J. Gatsby impression with a new slick 'do, and Katy Perry reveals her hardcore health regimen!

Also, Rihanna shows Chris Brown what he's missing with an up-close shot of her bare butt, Mariah Carey cuddles up to "Dem Puppies" and Rosie O'Donnell's baby does her best Clint Eastwood impression.

Plus, see Ellen DeGeneres and Jennifer Aniston hard at work for "The Ellen DeGeneres Show," Kim Kardashian's pregnant duck lips and Justin Bieber kissing Miley Cyrus!

Click "Launch Gallery" above to see these photos and even more celebs' personal pics!

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