Party DJ!

Party DJ is a music queueing app you use with your friends. Party DJ will shuffle all of your music, or your choice of playlist(s), and allow you and your guests with smartphones to vote on what tracks will play next. - Federico Viticci, MacStoriesPlease Note: Party DJ currently works only with music downloaded onto your device, so if you use iTunes Match you will need to download tracks to your device to play them in Party DJ.