Legendary singer and irritable old guy Bob Dylan will appear at Sunday’s Grammys and play a three-song set with Brit band Mumford & Sons and the Avett Brothers. In sort of an “everything old is new again†theme, the Grammys will feature performances from Dylan, Mick Jagger — paying tribute to the late Solomon Burke — and Barbra Streisand. Metamucil for everyone! [LAT]