Katy perry with rebecca black

Rebecca Black is an American pop musician made famous by her single "Friday", which received mostly negative reviews and was dubbed "the worst song ever" for it's use of auto-tune reasons. Black starred as herself in Katy Perry's music video for "Last Friday Night (T.G.I.F.)" and also gave Perry a makeover for the music video, indicating that Perry and Black are most likely good friends. The two also performed Black's hit during a show on the California Dreams Tour. She also has her own YouTube channel under the name, rebecca.