In 2000, as Matador Records notes, Parks and Recreation star Amy Poehler graced the cover of Yo La Tengo's "You Can Have It All" single. On the show's April 24 season finale, the New Jersey indie rockers performed on the show, as did Jeff Tweedy, the Decemberists, Letters to Cleo, and Ginuwine \u2014 literally, everyone who'd been promised to appear. Did Leslie decide to take that job and move to Chicago? And how is her pregnancy with triplets going? Will Tom ever get his restaurant off the ground? Don't worry, don't worry \u2014 won't spoil that stuff here. Music-wise, though:Ginuwine did his R&B classic "Pony," Yo La Tengo dressed up as Bobby Night and performed Night Ranger's power ballad "Sister Christian" and called themselves Bobby Knight Ranger, the Decemberists performed "The Crane Wife 3," and Letters to Cleo \u2014the '90s alt-rock band beloved by Adam Scott's character Ben Wyatt \u2014 performed their hit "Here and Now." Oh, and Tweedy's reunited, fictitious band Land Ho! helped Chris Pratt's Andy Dwyer \u2014 and his reunited, fictitious band, Mouse Rat \u2014 revive their song "5,000 Candles in the Wind," a 2011 episode's tribute to the town's beloved, deceased, miniature horse, L'il Sebastian.There was also a nod to the grand tradition of dead performer "holograms."Watch the full episode below, and keep an eye out for "Ron Silver" and a couple of other pretty notable guests.