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Fun and Funny Celebrity Twitter Pictures of Katy Perry, Justin Bieber, Jennifer Lopez

This Week's Fun and Funny Celebrity Twitter Pictures!

View in slideshow Fun and Funny Celebrity Twitter Pictures of Katy Perry, Justin Bieber, Jennifer Lopez

Stars were as social on Twitter as they were in real life this week. Justin Bieber photobombed Katy Perry and Russell Brand at the MTV VMAs, while Larry Emdur did his best impersonation of The X Factor contestant Luke "Introvert, extrovert, doesn't matter" O'Dell. Jennifer Lopez worked her new clothing line, and some of this year'sMasterChef contestants were reunited — click through to see all the pics, and don't forget to like us on Facebook and follow us on Twitter for exciting news and photos!

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