Beyonce, Nelly Furtado, Usher and 50 Cent are all celebrities who performed for el-Qaddafi family members and according to Rolling Stone (3-31-2011), have all announced that they have donated the money they made to charity.
Hm: tainted money or not would be one question the charity recipient boards might be asking. They might also be stating that just giving what was paid does not really cleanse but starts the cleansing process. I suppose too that those who then benefit from the work the charities are able to do because of the gifts might not themselves be that focused on the original source of the funds.