Katy Perry is getting futuristic on her new Lifetimes tour, which kicked off its North American run May 7 in Houston. Here ...

And while the voice is different and some song arrangements have changed, the one constant from quirky Perry are the campy ...

The Grammy-nominated pop star launched the U.S. leg of her new "The Lifetimes Tour" May 7 in Houston, followed by her OKC debut May 9 at Paycom Center.

Perry began her career in 2001, and has gone on to have five UK number one singles and two UK number one albums. She is best known for songs such as Roar, Firework, I Kissed A Girl and Teenage Dream.