Katy Perry's new song "Swish Swish" features the most random cameos and New England Patriots tight end Rob Gronkowski is one of them!

At approximately 2:24 in this bizarre video, which is set on a basketball court, Gronk holds up a sign that says "When does football season start?" If you blink, you'll miss it!

Other cameos include: Comedian Molly Shannon, NBA MVP Bill Walton, NFL vet Rich Eisen, Jenna Ushkowitz from "Glee,“ Gaten Matarazzo from "Stranger Things," and the world champion hot-dog eater, Joey Chestnut.