Katy Perry has credited her fiance Russell Brand with inspiring her second album, TEENAGE DREAM.
The pop star is engaged to marry the Get Him To The Greek star, who she began dating last year (09) - halfway through recording the project.
Speaking to the BBC, Perry explains, "There are some songs on the album inspired by love. There's a song called Hummingbird Heartbeat. He (Brand) gives me that Hummingbird Heartbeat."
Lyrics to another track, called Firework, were written after the funnyman read her a passage in Jack Kerouac's novel On The Road.
She recalls, "It was a paragraph that he said I was like. In the book he was talking about how he wanted to be around people who were buzzing, fizzing and making people go 'Argh, like fireworks across the sky.' I guess that's my whole vibe. I want to make people go 'Argh' in so many different ways. I want to be a living firework.
"Sometimes you're in a situation where it feels like this is the best you can get. I really do believe in true love and you should really find it."