James Corden recruited an assortment of 2016 Carpool Karaoke guests, like Adele and Lady Gaga, for a joyful performance of Mariah Carey's 'All I Want For Christmas.'
We all have nightmares. We regular folk have them about showing up to class or a big presentation in our underwear, and Ed Sheeran has them about screwing up his duet with Elton John at the Grammys on live national television. We'd bet Sheeran's are a bit more terrifying than imagining your boss seeing you in your skivvies.