We're not sure about you, but we can't seem to keep up with Katy Perry's dressing up box, which she raided this week for Halloween fancy dress costumes.

The California Gurls singer was the master of ceremonies at the Teen Choice Awards over the weekend, which gave her the perfect opportunity to don six different outfits as she appeared and reappeared on the stage.

For one presentation, she donned a goth girl costume, while another saw her come on stage as a geek with braces on a headset - wonder if she'd have pulled Russell Brand with that on?

Finally, Katy put on a cheerleader fancy dress costume to perform her new single Teenage Dreams, doing the splits at one point to show off her agility.

The Teen Choice Awards also saw a performance by Travis McCoy, Katy's ex-boyfriend, so perhaps all the changes of costume helped her to avoid him backstage afterwards!