R.E.M.'s Michael Stipe and Mike Mills

21 bands and solo artists, including Patti Smith, Calexico, and Bob Mould, celebrated the career and music of R.E.M. Wednesday night at New York's Carnegie Hall. Each musician covered a tune written by the Athens, GA, quartet. Here Michael Stipe and R.E.M. play "E-bow the Letter." To read SPIN's review of the show, click here. To see more of the night's artists, click "Next."