The internet is a weird and wonderful place.
For no apparent reason, Justin Bieber challenged Tom Cruise to a mixed martial arts fight Monday night on Twitter, tagging UFC president Dana White while calling out the movie star, who's 31 years his senior.
If that wasn't enough, UFC superstar Conor McGregor chimed in, offering to host the potential singer-versus-actor bout.
Oh, and McGregor wants to be on the card, too ... against Mark Wahlberg, one of the UFC's celebrity investors.
The Irishman previously challenged "Hollywood actress" Walhberg in March amid a continuous campaign to gain an equity stake in the UFC.
While Cruise has yet to respond to Bieber (he hasn't tweeted since January, so don't hold your breath), that didn't stop the internet from getting hyped for the celebrity clash.