Ron Swanson & Colin Meloy (via Nick Offerman Twitter)
The season 6 finale of Parks and Recreation airs on April 24, and executive producer Michael Schur has told The A.V. Club that the episode will have some pretty big name musical guests. Wilco's Jeff Tweedy, Yo La Tengo, The Decemberists, Ginuwine and Letters to Cleo will all appear, but not all of them will play themselves. Jeff Tweedy will be playing the former lead singer of a band called Land Ho!, and Yo La Tengo will play Bobby Knight Ranger, a Night Ranger cover band. You may remember that Ginuwine is "Donna's cousin," and Ben Wyatt is a pretty big Letters to Cleo fan.
Watch the clip of Tom learning Ginuwine is Donna's cousin below...