White, Underwood, and the Lumineers will join Rihanna, Taylor Swift, fun., the Black Keys, and Mumford & Sons in a contest of who can wear the most ridiculous porkpie hat on national television. Also just announced for the January 10 telecast: Ed Sheeran, Elton John, Dierks Bentley, and Miranda Lambert — but no Frank Ocean. Maybe he’ll win and then sing his acceptance speech?