Mariah Carey Doesn't Need Your Dress Rehearsal, ThanksKaryn Polewaczyk5/17/15 8:55pm1153EditInvite manuallyPromoteDismissUndismissHideGo to permalinkDress rehearsals: nice and cute and a good way to get pepped for the big show in theory, but not necessary if you’re one Mariah Carey, who blew off the final rehearsal scheduled before tonight’s Billboard Music Awards.