Justin Bieber Wears Gas Mask in London

This is one Justin Bieber fashion trend we doubt will catch on.

The singer was spotted with members of his entourage this week, shopping in London while going incognito. By wearing a gas mask?!?

As you can see, the disguise didn't exactly fool members of the paparazzi. But it did leave fans wondering: Really, Justin?!?

Fans are also curious just why Bieber is in England.

His tour doesn't make a stop there until next month, causing some to speculate: might he be visiting rumored new gal pal Ella-Paige Clarke?!?