03/19/2015 12:05 pm ET | Updated Mar 19, 2015

Justin Bieber Is Unrecognizable As A Security Guard In Latest 'Ellen Show' Prank

Justin Bieber's back on "Ellen" and this time, he's a security guard.

Well, not really. The singer, who has been quite the regular on "The Ellen Show," pulled a major prank on audience guests when he dressed up as a bearded security guard. Wearing a hat and sunglasses, Bieber was unrecognizable as he asked guests to perform sobriety tests and pretended not to know what an iPhone was.

Props on keeping a straight face, Biebs.

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