"I love you Donatella, but it popped darling," Carey said, laughing on stage after she finished singing her hit, "Always Be My Baby," her first performance of the morning.
"What we'll do is go to break, adjust, and when we come back we'll talk to Mariah Carey about how gorgeous she looks," Spencer replied.
After the commercial break, Carey emerged on stage in a brand new, stunning, long hot pink gown, a little more loosely-fit to ward off any future zipper problems.
Looking beautiful in the backup dress, Spencer asked Carey, "What's your secret?"
"I've been trying to do the best I can to stay in shape," said Carey. "But I need to catch my breath."
"This is a crazy time to be coming out here singing at the crack of dawn," Josh Elliot chimed in, thanking the Grammy-winner for putting on a fabulous show in Central Park.
Carey went on to complete the "GMA" concert series with the first-ever live performance of her new single, "#Beautiful," featuring Miguel.
PHOTOS: Celebrity Wardrobe Malfunctions
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