In a performance that got social media buzzing, Katy Perry and Rebecca Black teamed up for a surprise duet of viral hit "Last Friday Night (T.G.I.F.)" at Rebecca Black's Los Angeles concert last night ...

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.

Katy Perry reteamed with Rebecca Black last night ... video for "Last Friday Night (T.G.I.F.)," was at her Salvation tour stop at El Rey Theatre in Los Angeles last night when Perry joined her for a ...

Singer Katy Perry is scheduled to blast off on the next launch of Jeff Bezos' Blue Origin rocket, according to the space company.

Rebecca, meanwhile, donned an equally short leopard print mini dress with a flared skirt. She wore black heeled knee-high ...

Katy Perry reteamed with Rebecca Black last night ... (T.G.I.F.),” was at her Salvation tour stop at El Rey Theatre in Los Angeles Saturday when Perry joined her for a performance of that ...