Billy Joel on his child-bride Katie Lee Joel's singing abilities: "I just nod my head. I'm glad she's a good cook." After the cutaway: "Yeah, she's no Alexa Ray Joel, my daughter who's about her age!," Billy continued, and then Katie whispered the word "prenup" really softly under her breath through a taut uber-whitened smile, and then he rubbed the small of her back nervously and shut up. Thanks, "Extra"!