some exemples :
Robot Rock contains a sample from Breakwater - Release the beast

Harder Better Stronger => Edwin Birdsong - Cola Bottle Baby
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Digital Love => I love you more - George Duke
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Aswell some people will say ".. i like what they did they didnt steal music thats different"
if you look for exemple dj shadow , if you listen to the original tracks .. thats totally insane, he gives the samples an other dimension

and sorry for my english :p wich is not good