I had been looking for hiphop acapellas. I discovered Gilbere Forte - Pray and had some fun with it. Download it from http://Solitarymaninblack.bandcamp.com Get 85% off on all my songs. Feel free to use the songs for whatever you like.
I recommend this site for getting new, music onto the radio. Here is a site similar to Soundcloud.
Solitarymaninblack -Poppers-.wav