DJ Chorus making question??

So I am having trouble finding acapellas that have a good chorus to them. I want to have choruss like this one here but idk how he got it or who even sings it.
http://www.youtube.com/user/SoundclickB … VwGY_LZjpY

If someone could help me find some acapellas like this or refer me to something that can help me out please do

thanks