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Celebrity Viral Videos July 20, 2012

Video: A Beyoncé Countdown Remake, Katy Perry Karaoke, More Viral Hits!

It's Friday, which means another roundup of the best viral videos from this week. Check out our favorites, including this amazing re-creation of Beyoncé's video for "Countdown," Justin Bieber singing country, and Katy Perry rapping at a karaoke bar in today's PopSugar Rush — and then tell us which one you love most!