Keith Urban says judging American Idol with divas Mariah Carey and Nicki Minaj is cake -- thanks to his “estrogen nest” at home with wife Nicole Kidman and their two daughters.

Keith and Nicole sat down with Access Hollywood’s Shaun Robinson, who quizzed the couple on his experience on Idol. Nicole said, “He adores [Mariah and Nicki], actually… A four-year-old and a two-year-old and a wife, a lot of girls in our household.” And Keith added, “A literal estrogen nest is where I live.”

So, have things calmed down between Nicki and Mariah? Keith says, “Absolutely, yeah. I think the live show’s going to be a blast.”

An all-new episode of American Idol airs tonight at 8 p.m. ET on FOX.