After a performance in Lodz, Bieber headed to the airport for his private jet flight and left his car shirtless to the reach the terminal.
The 19-year-old was earlier seen returning back to his hotel room only in trousers after a performance in Birmingham, reported the Sun Online.
An airport official clarified that Bieber removed his clothes on his own wish.
"He wasn't told to take off his clothes. He had no metal objects on him. He's quite skinny so I assume he was probably freezing," the official said.