Saturday Night Live · season 42, episode 816 · Saturday, December 3, 2016 Host: Emma Stone. Musical guest: Shawn Mendes. • Shawn Mendes performs "Mercy" and "Treat You Better". • Alec Baldwin appears as Donald Trump in the cold open. • Jennifer Aniston appears on Weekend Update, opposite Vanessa Bayer's impersonation of Aniston's Friends role Rachel Green, and in "Film Screening". Wiki link