Former members of R.E.M. got together over the weekend at guitarist Peter Buck's Todos Santos Music Festival in Mexico. Fellow former R.E.M. member Mike Mills joined Buck onstage, along with R.E.M. sideman Scott McCaughey, for a live rendition of the R.E.M. favorite "(Don't Go Back to) Rockville." They were joined by a charismatic bald-headed singer - who wasn't Michael Stipe, but ex Live frontman Ed Kowalcyzk, who traded verses with Mills.