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 faces challenges with ticket sales for her Lifetimes tour and seeks advice from Taylor ... interaction tactics to the selection of her setlist and even some visual details like costume ...

Katy Perry surprises Rebecca Black with an on-stage tour invite for ‘The Lifetimes Tour.’ Fans can expect sci-fi visuals, aerial stunts, and deep-cut setlists. The tour kicks off May 7.

For the first time in more than seven years, pop icon Katy Perry is headed out on tour. She'll perform 75 dates on four ...

Katy Perry "proposed" to Rebecca Black to invite her to support her on 'The Lifetimes Tour'. The 'Firework' hitmaker was a surprise guest at the 'Friday' singer's concert at the El Rey Theatre in ...

Katy Perry has tapped iconic "Friday" singer Rebecca Black to join her in her "Lifetimes" world tour! On Instagram, the pair shared a skit showing Rebecca with fake, exaggeratedly large breasts.

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 will be supported by Rebecca Black on 'The Lifetimes Tour'. The 'Firework' hitmaker was a surprise guest at the 'Friday' singer's concert at the El Rey Theatre in Los Angeles on ...