The Washington Posts's "Celebritology" blog reports on a sighting of stars Jason Segel, Emily Blunt, Alison Brie and John Krasinski doing karaoke at an Ann Arbor bar over the weekend.
Segel, Blunt and Brie are in the cast of the movie "Five Year Engagement," which has been filming in the area recently. Krasinksi, who plays Jim on TV's "The Office," is Blunt's husband.
Read the full report from the Washington Post, and check out these (admittedly ragged) YouTube clips:

AnnArbor.com