Most Inspired (and Inspiring)
Christina Aguilera

Everyone knows Aguilera's got pipes — but probably not even her most devoted fans could've imagined her channeling James Brown with the magnetic fervor she displayed tonight. Crouched on the floor, clutching the mic stand, and belting full-throttle from beginning to end, Xtina didn't so much sing ''It's a Man's Man's Man's World'' as she did unleash it on her mesmerized audience. This is the 2007 Grammy performance to remember; the Godfather of Soul would be proud.