Here's why Justin Bieber says he lost a beer shotgunning contest in Las Vegas

Justin Bieber was partying in Las Vegas this weekend, where he was supporting his friend Floyd Mayweather’s fight. Part of the celebrations included having a shotgun contest with his friend, Sam Shahidi, but he lost.

image via Wong/INFphoto.com

The “What Do You Mean?” singer, who always supports Mayweather when he fights, blamed his loss on not practicing in college.

"I lost but I didn't go to college," he wrote as a caption to a video of it happening, which shows Shahidi beating him easily.

Although he recently turned the legal age to drink in the U.S., Bieber has admitted to drinking as early as age 18 back in 2012.

He told GQ, "For me, it's just like, I like to be in control of myself. I mean, I've had a beer, like, before...But I never get out of control."

I lost but I didn't go to college @sammy

A video posted by Justin Bieber (@justinbieber) on

video via Instagram from Justin Bieber

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