Justin Bieber's world tour is in London. Like any business traveler J-Beebs wanted to spend his downtime shopping. So he  got all dressed up and hit the shops. But you know the Beebs, he can't leave the house without his favorite gas mask. Look, it's what all the cool kids are doing nowadays.

I so hope that some goofball told him "Ahh yea Mr. B...cuz like, we in London, like you gotta wear the mask so you don't, like get King George's Revenge and spend the rest of the tour in the bathroom."

He also did it on Instagram.

instagram.com/justinbieber