Ignore this guy, to even ask such a question shows he's got a lot to learn ^^^^
Acapellas/vocals always bring a little spice to a DJ set because people connect with them, especially if they have been working all week and hearing tracks on the radio or listening to music in the car - the power of a well-placed acapella changes the floor instantly.
There are lots of places to find them, other producers are a good place to start if you know any?
Websites like acapellas4u, acapellablog and other sites offer them in return for signing up and posting on a topic. You can only see the TS posted link if you reply so you'll notice a theme of a topic, hidden link and then 10 pages of 'thanks' replies just so people can see the link.
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