Here's another excellent little coup for Concord's Avett Brothers: They're playing Sunday night's Grammy Awards ceremony in Los Angeles, even though they're not nominated. But wait, it gets better: They're playing with Bob Dylan, as part of a three-song "special salute to acoustic music" that also includes Mumford & Sons (a.k.a. the British Avett Brothers) in addition to Dylan. That might be even cooler than the Johnny Cash star turn the Avetts did last year. "Head Full of Doubt, Road Full of Promise" is on the set list.

The Grammys will be on CBS from 8 to 11:30 p.m. Sunday.