"The coolest thing about you, though — I really hope people get to see from you, like, just working with you on the show — backstage, I have to have my eye makeup redone, she's hysterical," Clarkson ...

The only thing better than Kelly Clarkson and Ariana Grande's modern Christmas duet "Santa, Can't You Hear Me" is hearing the two icons perform it live — and that's exactly what happened during NBC's ...