Gilmore Girls: A Year in the Life packs a hell of a lot into its four episodes. We finally discover who Rory (Alexis Bledel) ends up with, what those mysterious last four words are, and that there might be future episodes on the way. On top of all that, creator Amy Sherman-Palladino also manages to squeeze in a ton of celebrity cameos, from former Parenthood stars to a few iconic musicians. Scroll through every famous face you might have missed, but be warned: minor spoilers below!