Is there a way i can get the vocals to some rap songs?

i don't care what songs or what artists. i just want to find some vocals with no background music. does anyone know where i could get something like this?

rappers always make smash-ups and mixes where they take another rapper's voice and transplant it into a new song so maybe there is a way we can get a hold of these vocals.

Yea, download accapellas.

the internet, duh. no but if you got like kazza you can download accapellas