Katy Perry for H&M Against AIDS

Katy Perry designs clothing for H&M to promote AIDS awareness.

Katy Perry puts her design skills to work.

Celebrities are going crazy for H&Ms fashion campaign against AIDS and Katy Perry and Dita Von Teese are just two of the latest celebrities joining the cause.

H&M's Fashion Against AIDS annual charity line has quite a few more celebrities joining in to design clothing with their own personal safe-sex slogan printed on it. Katy Perry, Dita Von Teese, Robyn, Yoko Ono, Estelle, and many more are all creating clothing.

We're big fans of Katy Perry's design, which is a leotard for women and a t-shirt for men and says, "It's what's on the inside that counts." Cyndi Lauper's shirt appropriately says, "Girls just wanna have safe sex" and Yoko Ono's, "Imagine peace."

25% of sales from the clothing, which is all 100% organic cotton, will be donated to youth HIV/AIDS awareness projects. The line will be on sale at H&M stores on May 28.