Murphy and Arsenio Hall both played multiple roles in that flick.
Murphy -- the Prince, the barber, the lead singer of Sexual Chocolate, the Jewish guy in the barber shop
Hall -- the Prince's friend, one of the guys in the barber shop, the reverend who introduces Sexual Chocolate, and one of the ladies in the bar scene montage where the Prince and his friend are meeting women
Incidentally, I don't know if you've ever seen it, but years and years ago while still on Saturday Night Live Murphy did a skit where he went undercover as a white man. It's f***ing hilarious...