Rebecca Black was, at age 13, the singer of Friday , the most popular (and most-mocked) video on YouTube in 2011 (Katy Perry, concerned about the internet bullying, invited Black to star in her video Last Friday Night ). Today she is 22 and talks to BuzzFeed video about her viral fame at 13 and what came after. (Previously on MetaFilter: Friday copyright dispute .) She now has a YouTube channel