Saturday Night Live · season 42, episode 829 · Saturday, May 20, 2017 Host: Dwayne Johnson (5th time — joins the Five-Timers Club). Musical guest: Katy Perry. • Katy Perry performs "Swish Swish" and "Bon Appétit" with Migos, and appears in "Rap Song" . • A 15-year-old boy named Russell Horning appeared in Perry's first musical performance, performing his signature arm-swinging dance move known as the Floss while wearing a backpack on stage. The performance gained social media attention with many dubbing him as the "Backpack Kid", and his dance move becoming an imitating trend among children, teens, and celebrities. • Other dancers who appeared in Perry's first musical performance included Indya Moore, Jose Gutierez Xtravaganza, Vivacious, Yuhua Hamasaki, Scarlet Envy, and Brita Filter. • Alec Baldwin and Scarlett Johansson appear in the cold open as Donald Trump and Ivanka Trump, respectively, performing a rendition of Leonard Cohen's "Hallelujah". Additionally, Baldwin appears in the opening monologue to welcome Johnson to the Five-Timers Club. • Tom Hanks appears in the opening monologue and as David S. Pumpkins in "Rap Song". • An image of Brad Grey, who died on May 14, is shown in silence after Weekend Update. • Vanessa Bayer, Bobby Moynihan and Sasheer Zamata's final episode as cast members. Wiki link