Mariah Carey is certainly in or heading for musical icon status. After 25 years, her holiday hit All I Want For Christmas Is You finally hit #1 on the Billboard magazine "Hot 100," making her the all-time top-charting single artist with 19 #1's, finally breaking a tie with Elvis Presley. That's some serious achievement. And now, Mariah comes on The Late Late Show with James Corden to sing another of her (newer?) holiday songs from 2010, Oh Santa. Whatever you may think of her, the girl's still got it.