Get "Swish Swish" off Katy's new album 'Witness': http://katy.to/witnessYd WITNESS: The Tour tickets available now! https://www.katyperry.com/tour Starring Katy Perry, Nicki Minaj, Molly Shannon, Terry Crews, Hafþór Júlíus "Thor" Björnsson, Bill Walton, Rich Eisen, Gatan Matarazzo, Jenna Ushkowitz, Christine Sydelko, Dexter Mayfield, Doug The Pug, Russel "Backpack Kid" Horning, Iris Kyle, Rob Gronkowski, Karl-Anthony Towns, Joey Chestnut, the ladies of GLOW (Sydelle Noel, Britney Young, Kia Stevens, Jackie Tohn), Carter Wilkerson, West Hollywood Cheerleaders, Amanda LaCount, and Nugget as herself.