Sydney Sweeney shut down rumors she and Glen Powell had an affair while making herSaturday Night Live hosting debut on Saturday, March 2. The blonde beauty, who hosted alongside musical guest Kacey Musgraves, began her monologue by jokingly addressing “some stuff I’ve seen about me online.” “I once said that I used to work at Universal Studios and then someone online accused me of lying about that, which is insane. If I didn’t work there, how would I know all the Universal characters, like Shock, The Monions and Harry Porter,” she began before discussing how “a woman on TikTok [who] went viral…