Find it
here. And in their own words:
WhoSampled.com is a community site for discovering and discussing sampled music, remixes and cover songs. Anyone can submit information about a sample, remix or cover and subject to approval it will be published on the site to be discovered and discussed by the world. WhoSampled was created out of our love for sampling, music history and music production. It aims not only to be the most comprehensive, detailed and accurate database of samples, remixes and covers on the web but also a fun and engaging place to be at. This website is all about the discovery of new and old music, the exploration of musical influences and the sharing of knowledge.