For some reason, Katy Perry really likes the Rebecca Black. You know, the girl with hundreds of millions of hits on her terribly auto tuned song Friday. Katy even had Rebecca guest star in her smash hit music video, Last Friday Night.
Well, Katy was so nice, she invited Black onto stage with her at a her last concert in Los Angelas. They sang Friday, of course, and for some reason, she sang it really slow and it sounded even weirder.