[KarlMalone]

Katy Perry: Streaking inspired music

The party-loving star decided to write the track Last Friday Night (T.G.I.F.), after enjoying a debauched night out with pals in California, which involved Katy showing off her curvaceous body. She joked that the raunchy threesome mentioned in the song didn't actually occur though.

"There's nothing better than an impromptu dance party with my friends. My track Last Friday Night (T.G.I.F.) is a song about debauchery because I had one of those nights in Santa Barbara. We went out to this place called Wildcat and got crazy," she revealed.

"We had a couple of beers and danced until we died, then brought the party back to the hotel room. Most of that song is actual truth, apart from the ménage à trois... unfortunately! But, yes, streaking in the park, that's what we did, so we had to write a song about it the next day!"