Katy Perry loves to disguise herself and hand out free tickets to her concerts.

She said: "Constantly travelling can make it hard to exercise, but my favourite workout to do on tour is to ride around the town or city I'm visiting on my bike. I love to explore a new city in disguise and hand out tickets to my show."

Katy also likes to get on the exercise bike in the gym, and regularly attends a special spinning class where participants are motivated by music.

She added to Closer magazine: "I try to exercise three to four times a week and, on days when I'm not working, I do a really fun activity, like hiking. I also love soul cycling, which is a spin class with high energy coaching and fun, upbeat music."