Katy Perry has revealed why she decided to call her new album Teenage Dream.

The singer, whose new single is called 'California Gurls', came up with the title while writing a song with the same name in her hometown of Santa Barbara, where she spent her teenage years.

She told MTV: "I want to call it 'Teenage Dream' because there's a song on the record called that and I wrote that song in Santa Barbara and it was a very pure moment for me, because that's where I'm from.

"And it was, like, where I started my creative juices. And also it kind of exudes this euphoric feeling because everybody remembers what their teenage dreams were - all the girls that were on your poster walls.