Snapbacks and tattoos? Nah, more like gas masks and tattoos for Justin Bieber! The pop star is overseas in London for a few performances, and decided to hit the streets covering his face up with a gas mask! What in the world for? Clearly there was no danger threatened beforehand, as he was the only one on his team to be wearing one. Taking to his Twitter, the Biebs tweeted, “i am the #masterofdisguise” but ummm…I am pretty sure everyone knew exactly who that was walking down the street. LOL! Check the pics in the gallery, along with the new ink he recently got.