"[The most diva thing I've seen her do is] have twins," Cannon shared. "She shut the whole hospital down."
"When they was born, she made me play her music as they was coming out. It was a fantasy. They was dancing to 'Fantasy,'" he told a delighted Williams, who responded, "So it's true!"
Cannon and Carey welcomed daughter Monroe and son Moroccan in April 2011. The actor previously discussed his twins' birth in an interview with The Gayle King Show the same year.
"Now my wife wanted to make sure that when the babies came out, that they came out not only to a Mariah Carey song, but a live performance from Mariah Carey ... so they came out to a round of applause," he said, according to Us Weekly.
Cannon and Carey split in 2014 after six years of marriage, but have remained friendly since. The actor told Williams he and Carey called it quits after he realized they were no longer growing and challenging each other as a couple.
"I feel like when two people are in a relationship, it should be about growth. It should be a situation where everyone's becoming a better human being," he said. "When you get to a point where there's no longer any growth and you're not bettering each other ... it was probably best [to split]."