Whether they created groundbreaking new sounds or were pioneers in the digital era, these are the artists most responsible for the state of alternative music now.
Tweedy, occasionally stifling laughter and showing off his whistling skills, treats Colbert to a sweet little ditty that would give anyone the best of dreams.
The stars aligned at this past weekend's kickoff of the annual Todos Santos Music Festival in Mexico for a few high-powered covers in honor of the late legend.
For their second album, Jeff Tweedy and Wilco moved further from their roots in Uncle Tupelo and released a 19-song collection as eclectic as it was ambitious.