Chug, chug, chug!
Justin Bieber may be known for some of his bad boy antics in the past, but apparently he never learned to chug a beer!
The Where Are Ü Now singer was in Las Vegas to watch his buddy Floyd Mayweather Jr.'s fight and decided to shotgun a beer with his friend Sam Shahidi at a pool party.
[ Related: Watch Justin Bieber Become IRATE With The TODAY Show Director Over His Camera Placement ]
Fortunately for us, the 21-year-old singer posted the video to Instagram, unfortunately for JB, he needs a little practice on his chugging skillz!
But the What Do You Mean singer did his best to come up with an excuse by captioning the video:
"I lost but I didn't go to college"
Ch-ch-check out the video for yourself (below) and let us know if you think Justin should be quicker, regardless of not going to college!
Tags: alcohol, floyd mayweather jr., instagram, justin bieber, music minute, sin city