Katy Perry teamed up with Rebecca Black to perform 'Last Friday Night (T.G.I.F.)' and invited her on the Lifetimes Tour.

In a performance that got social media buzzing, Katy Perry and Rebecca Black teamed up for a surprise duet of viral hit "Last ...

Katy Perry’s 2011 song "Last Friday Night (T.G.I.F)" from her third studio album, Teenage Dream, has debuted on US Spotify.

Katy Perry has teamed up with Rebecca Black for Perry's Lifetimes tour. Black, who appeared in Perry's 2011 video for Last ...

This is a full-scale production, full of fun and flair, with dramatic piano crescendos, squalling guitar riffs and bombastic ...