Katy Perry is the latest face to sign up to H&M's campaign for 'Fashion Against Aids'.
The gorgeous singer joins the likes of Dita Von Teese and N.E.R.D. who have already designed some special garments to go on sale.
Apparently Katy's design for the store includes a printed bodysuit, featuring a smiley face inside a heart.
According to Catwalk Queen, the garments will be sold via H&M's Divided departments to help increase the awareness of HIV/AIDS.
The disease effects many affects many young people all over the world, with previous celebrity ambassadors including Rihanna and Jade Jagger.
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