Post Malone fans know the star likes to play beer pong against fellow celebs in his downtime, and now he’s turned his hobby into a 10-episode series for Messenger and Instagram. Post Malone’s Celebrity World Pong League will air Wednesday and Fridays, starting November 18.  Among the stars you’ll see Posty taking on: Halsey, Jason Derulo, Bebe Rexha,…… more