Justin Bieber committed a hockey no-no when he stood on the Chicago Blackhawks' logo in their dressing room at the United Center, where Bieber performed July 9.

The 19-year-old Bieber, from Canada and a known hockey fan, should have known that NHL teams have an unwritten rule that no one is permitted to step on their logo in the dressing room.

So with Bieber scheduled to perform Saturday night at TD Garden in Boston, the Bruins took measures to make sure Bieber didn't stand on their logo.

They roped it off.