The National performed with Julien Baker, Phoebe Bridgers, others at Eaux Claires (watch)

Justin Vernon and Aaron Dessner's Eaux Claires festival just wrapped up its fourth edition in Eau Claire, WI. The lineup and schedule, which weren't announced until the beginning of the festival's first day, included a Saturday (7/7) night set from The National on Eaux Claires' stage in the round, Flambeaux. The band had a few surprises in store for Eaux Claires, including guest appearances and the live debut of a couple of new songs. After starting off their set with Phoebe Bridgers adding vocals to "Sorrow," The National debuted two new songs, including one where they were joined by Josh Kaufman and Mike Lewis.

Later in the set, Julien Baker appeared on a satellite stage to perform her song "Appointments," which segued into The National's own "Fake Empire," with Julien adding backing vocals. Sharon Van Etten and Chastity Brown also made guest appearances, and the set ended with a singalong of "Vanderlyle Crybaby Geeks." Watch video from The National's set, Phoebe and Julien appearances included, below.

Justin Vernon and the Dessners are throwing another festival this summer, the second PEOPLE festival in Berlin. It's also the name of their new online music platform, which launches in August.

The National return to NYC for There's No Leaving New York at Forest Hills Stadium in September, and single day tickets for Saturday and Sunday are on sale now. Phoebe Bridgers is also on Saturday's bill - perhaps she'll reprise her "Sorrow" guest spot that night?