Just came across this by chance found it really interesting so thought I'd share

http://www.whosampled.com/

thanks. gonna get a load of "useless information" as my mum puts it, from this site

Good site - hours of fun.

Not 100% accurate. I like the fact that it claimed the Bee Gees covered 2 other peoples songs - If I Can't Have You and Islands In the Stream. Both songs written by The Bee Gees???