When: Sat., 11:30 pm ET, on NBC
What: SNL's 40th season has featured numerous CelebStoners as hosts (Woody Harrelson, Sarah Silverman, Cameron Diaz, James Franco), and one great pot sketch. The upcoming hosts and musical guests are as follows: Scarlett Johansson/Wiz Khalifa (May 2), Reese Witherspoon/Florence + the Machine (May 9) and Louis C.K./Rihanna (May 16).
