In a surprising turn of events, Justin Bieber has challenged Tom Cruise to a rather unusual showdown. The pop sensation, known for his music as well as his occasional antics, took to social media to threaten Cruise's head with the Bottlecap Challenge. This challenge involves unscrewing a bottle cap with a roundhouse kick while ensuring the bottle remains standing. Bieber posted a tweet challenging the Hollywood actor, saying, "I wanna challenge Tom Cruise to fight in the octagon. Tom, if you don't take this fight you're scared and you will never live it down." The tweet quickly gained attention and left fans and celebrities alike puzzled.