"She is very happy," he told PEOPLE at the Metropolitan Museum Costume Institute Gala in New York on Monday. "I've spoken with her and she is superb. She is over the moon."
In his latest communication from the singer, he said she sounds like a woman in love. "I received an email from her [Monday] and she is so happy. She really sounds like someone on her honeymoon."
Talley also had words of praise for the songbird's new husband. "I love Nick Cannon for Mariah," he said. "For Mariah, this is poetry."
As for her wedding fashion, Talley said the nuptials happened so quickly that "I didn't have the time to offer her any style tips!"