![Rebecca Black and Katy Perry Duet On “Friday” [VIDEO]](http://townsquare.media/site/147/files/2011/08/rebecca-black-katy-perry.jpg?w=980&q=75)
Rebecca Black and Katy Perry Duet On “Friday” [VIDEO]
Just when you thought Rebecca Black was about to fade into viral video obscurity - she re-appears onstage with Katy Perry at a concert in Los Angeles for a surprise rendition of "Friday". Which seat will she take?
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