Nick Cannon Recycled Mariah's Engagement Ring?

Nick Cannon has landed himself in hot water with new wifey Mariah Carey after she learned that her $2.5 million dollar engagement ring was recycled from his last relationship.

A source close to Mimi said, "Mariah was very upset when it was claimed the ring was secondhand and had been used on his previous fiancée.

"She's so embarrassed. She certainly won't be wearing it in public again."

The 15+ carat diamond ring looks almost identical to the one he bought Selita Ebanks last year.

Cannon was even spotted at Jacobs jewelry store last week, which is where he bought Selita's ring, perhaps making minor changes to the new ring?

Whatever the case is, Mimi the Diva is not a happy camper! Anyone else smell an annulment?