Sweet charity: Katy Perry and Dita Von Teese turn fashion designers for a good cause H&M collaborations will benefit AIDS charities

Lauper and rap group N.E.R.D also got in on the act for high street store H&M. Dita's offering - a white cropped T-shirt which featured a print of a woman's face - was certainly demure by her standards Of course, there was a hint...