The only room with as many celebrities as Windsor Castle on Saturday was the Saturday Night Live studio, which saw alum Tina Fey return for the season finale—along with perhaps every single one of her friends, reports Variety. Fey opened with a monologue in which she announced she'd take audience questions, and proceeded to take them from the likes of Jerry Seinfeld, who wondered if the show wasn't getting a little too lousy with celebrity cameos, before moving on to Benedict Cumberbatch, Chris Rock, Robert DeNiro, Anne Hathaway, Fred Armisen, Donald Glover, Tracy Morgan, and, well, you get the idea. Fey also revisited her Sarah Palin character, as well as the Mean Girls musical. Highlights in the gallery. (More Saturday Night Live stories.)