Hey what songs should I put on a party playlist?

Im throwing a huge party, and my friends have these really nice home theater speakers and such. I want to know what songs I should put on a playlist, for like a house party. 18-22 yr old mainly....alchohol will be there. Im looking for like really good r&b rap hip hop songs....like in the ayer by flo rida....sumthing ppl can party/dance too....thanks guys