Katy Perry New Album More 'Grown Up,' Says 'American Girl' Singer Bonnie McKee

Songwriter-extraordinaire turned singer in her own right Bonnie McKee just released hit song "American Girl." The frequent Katy Perry collaborator (she brought us "California Gurls," "Part Of Me" and "Teenage Dream" and "Last Friday Night") can't seem to dodge questions about her famous pal. Where journalists should be asking pop music's secret weapon about her own music, McKee continues to field questions about Perry. We did learn a bit about Perry's new album, though, which McKee says will be more "grown up."

We wrote three or four songs, I guess," McKee told MTV News. "So I have four songs with her coming out." 

"I think it's a little bit more grown up, and it's really interesting," McKee added. "I'm really excited for the world to hear it because she's just - she's taking a new approach. And I don't want to say too much about it, but it's definitely different. It's definitely a little more mature than the 'California Gurls' of yesterday." 

Katy Perry is growing up, y'all!

(I guess getting divorced via text message will do that to a person.)

Are you excited for a more mature Katy Perry album?