'All Was Well at Rehearsal': Mariah Carey Rep Says the Singer Attended Sound Checks for New Year's Eve Performance

Mariah Carey's not so rockin' New Year's Eve performance was not due to a lack of rehearsal, a representative for the singer tells PEOPLE. The rep says that Carey rehearsed at 3 p.m. "She went through vocals and her team ran through sound. All was well at rehearsal. She was prompt for rehearsal and her performance." In photos and a video posted by TMZ, Carey can be seen rehearsing with backup dancers prior to her performance for the ABC special Dick Clark's New Year's Rockin' Eve with Ryan Seacr...