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 reteamed with Rebecca Black last night, and their joining forces is looking to last through Lifetimes - as in Perry's so-named tour. Black, who appeared in Perry's 2011 video for "Last Friday Night (T.

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

Katy Perry has teamed up with Rebecca Black for Perry's Lifetimes tour. Black, who appeared in Perry's 2011 video for Last Friday Night, was at the Los Angeles stop on her own Salvation tour on the weekend when Perry joined her for a rendition of that song.

Katy Perry has set the internet ablaze with a surprise proposal during her Los Angeles show.The pop icon performed at the El Rey Theatre over the weekend and brought a special guest on stage.She sang rendition of her 2011 hit track Last

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

Katy Perry wore a zebra print micro mini skirt that perfectly coordinated with Rebecca Black's leopard print mini dress for a duet of 'Last Friday Night' in LA.