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

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

Rebecca Black will be joining Katy Perry on her Lifetimes Tour starting from May, the singers have confirmed. It comes after ...

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

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 ...

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.

LSU gymnast star Livvy Dunne and her sister Julz enjoyed a special Katy Perry concert on Mardis Gras weekend and brought out their best glam looks.

All the latest news, photos and more on the Firework singer. The American superstar rose to international fame in 2008 with her hit second album One of the Boys, and has since gone from strength ...