Katy Perry is teasing her new music video for "Birthday," where she completely transforms herself into a series of the "world's worst birthday party entertainers."

In the preview clip, the 29-year-old singer is unrecognizable, playing roles of her alter egos, including Goldie Dancer, Yosef Shulem, Kriss the Clown, Ace the Animal Trainer and Princess Mandee.

Playing an old flapper girl, Perry covers herself in wrinkly skin and sagging breasts. "My name is Goldie because of my golden nuggets," she says in a British accent. "I was great friends with all the boys in the Rat Pack, have you heard that song 'The Lady Is a Tramp?' That might be about me."

The singer also becomes Jewish entertainer Yosef Shulem, completing the look with fro, Kippah and mustache. "I am a birthday party entertainer, I do Barmitzvahs, I do weddings," she introduces her male character. "Did you hear about the rabbi who did free circumcisions? He only did it for tips."

Katy Perry puts on the big red clown shoes and says, "I saw this thing on Craigslist to be a clown, make a few bucks at the weekend, I'm not a birthday party entertainer, I'm just trying to get some cash on the side, don't start drinking, kids."

The singer then morphs into acne faced animal trainer. "Unfortunately, I do look like papa smurf right now, I run a petting zoo everywhere, but I think I just lost my license," she says. Lastly, dressed in pink dress, Perry plays the role of self-obsessed princess. "I am Mandee Rogers aka lil princess with no, I, I am a cancer, I am a water sign," she says. "I dress up as a princess and basically face paint these girls' faces and stuff and tell them stories and things that never come true."

Katy Perry's hilarious visual for "Birthday" is set for a release on Thursday (April 24).