Meanwhile, Dick Clark Productions issued a statement to the Associated Press saying that in "very rare instances" there are technical errors that can occur with live television. It said an initial investigation, however, indicated it wasn't responsible for Carey's, err, unusual performance.
"We want to be clear that we have the utmost respect for Ms. Carey as an artist and acknowledge her tremendous accomplishments in the industry," the production company statement said.
A person familiar with the production of the show who asked for anonymity to speak publicly about the incident said all of the other performers, including Gloria Estefan, rehearsed onsite for their performances and Carey was there but had a stand-in for her rehearsal, atypical for the show's performers. The person said all of the monitors were working and no technical problems were found.
Perna later disputed the claim that Carey did not rehearse.
"Mariah did in fact rehearse at 3:00 p.m., Perna said in an email to The Associated Press on Monday. "She went through vocals and her team ran through sound. All was well at rehearsal. She was prompt for rehearsal and her performance."
Ironically, Carey was Dick Clark Productions' first live performer for the broadcast in 2005, when it went off without any such problems.