You would think everyone knows who Justin Bieber is.
Apparently, one security guard working Floyd Mayweather Jr.'s recent fight with Andre Berto had no clue. Either that, or he just didn't care.
Here's how TMZ described a strange scene that unfolded involving the pop star:
The video is kinda bizarre ... since everyone knows Justin and Floyd are as tight as can be—but one security guard apparently missed Bieber walking ... INTO THE RING with the champ.
Witnesses tell us Justin was actually in the ring until police politely asked him to step out during post-fight ceremonies. The video begins as Bieber tries to get back in, only to have the guard stand his ground and bark ..."You wanna be escorted out in handcuffs, young man?"
Bieber really missed a golden opportunity to respond to the guy's question with "What Do You Mean?" and immediately break out into a choreographed dance.
Shake it off, Biebs.