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

Perhaps Katy Perry is taking Stevie Nicks's advice to "get off the internet" a little too literally: as the prophetic "E.T." music video foretold, the pop star is being sent into space.

Katy Perry/Instagram Katy Perry is opening up about ... clips and snaps of Guerrero helping her get ready for events and music video shoots, as well as the pair hanging out together.

Katy Perry surprised the audience at her Los Angeles concert by bringing Rebecca Black on the stage for a special performance of Last Friday Night (T.G.I.F.).

After years of lobbying Musk to try and take her to Mars, Katy Perry has switched sides to explore space with Jeff Bezos ...

Katy Perry will be supported ... forces on a rendition of Perry’s 2011 hit 'Last Friday Night (T.G.I.F.)' – 14 years after Black made a cameo in the music video. Perry proposed to Black ...

He’s not the number one fan of Katy Perry, but he’s the number one fan ... She confirms the news in the music video for her song “Never Worn White” by cradling her baby bump at the very ...

Katy Perry is opening up about the loss of her ... clips and snaps of Guerrero helping her get ready for events and music video shoots, as well as the pair hanging out together.

On top of all that, Perry also has a long-standing, well-documented love of outer space. The most obvious example of this obsession is her hit song, E.T featuring ... the 2017 Music Video Awards ...