Songs for 12 year old birthday dance party?

Hi, my cousin is turning twelve this saturday(yeah in two days) and the invitations say that is a dance party and im very worried that he's birthday is a flop because he's dad didnt wanted a dj so it's going to be Ipod songs from he's dads library! And yeah im going to the party too im 14 ! But please help, any suggestions will be helpful! Thanks! :)