Jimmy Fallon learned the hard way what happens when you ask Nicole Kidman about Christmas. During her appearance on Wednesday's , the star and the late-night host had a hilarious exchange.Kicking off her time on the couch, after joining Fallon for a round of “What’s in the Box,” the host asked the 54-year-old actress if her family, which includes husbandKeith Urban and their two daughters, were ready for the upcoming holiday. “Yes, we’re all ready and we’re celebrating.