The term 'epic' isn't one we use lightly. It's reserved for occasions that are simply so. This is one of those occasions. This video puts Mariah Carey's previous efforts in the serious shade. 

Prepare for pro-wrestling fiances, 'back shaving', drive-thru orders being sung acapella, star-hugging, and the most amazing sight of all - James Corden managing not to crash (again) despite spending a good 75% percent of his time waggling his hands around instead of keeping a strict 10-to-2 grip on the wheel. Even Hudson gets unnerved at one point - before she hollers out the window at a bus. Legend.