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

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

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

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

There's a stranger in my bed, ...

Katy Perry’s “Roar” directly echoed Reddy ... Perry has often aligned herself with outsiders (just see her video for “Last Friday Night (TGIF)”), but in welcoming them with open ...

Fourteen years after ‘Friday’ video made her the target of cruel comments online, the O.C. native will play Honda Center and ...

When Helena Moreno was presenting the proclamation, the famously cheeky singer asked if she needed to flash city officials and the audience to seal the deal.