Attention future “American Idol” contestants: Don’t expect rainbows and butterflies when you’re auditioning in front of Mariah Carey. The pop diva will be the “toughest judge” on the panel, according to her husband Nick Cannon.

“She’s very serious about music and singing. She’ll probably be the toughest judge that’s ever been on [the] show,” Cannon told “Access Hollywood” of his Grammy-winning wife.

Millions of viewers will get to see another side to Mimi, whose new single “Triumphant (Get ‘Em)” is set to debut next month. “People don’t know my wife’s sense of humor,” added the host of “America’s Got Talent.” “They’re about to get the whole Mariah Carey, raw and uncut! And see the woman that I fell in love with.”

But don’t expect her to give up her diva ways. “Nah, that ain’t happening,” laughed Nick. “It’s Mariah Carey time!”

Earlier this week, Mariah was announced as the newest “Idol” judge, filling in for Jennifer Lopez. Her one-year contract is reportedly worth $18 million dollars. She will take a seat at the judges’ table alongside Randy Jackson when season 12 premieres in January in Fox.

Do you think Mariah will be as tough as former “Idol” judge Simon Cowell? Sound off below.