Justin Bieber may be known for being one of the world's most popular performers today, but he is also a very fit young man who knows a thing or two about the boxing ring.  It may not be often that the young singer steps into a boxing gym, but when he does, who better to do it with than the most renowned champion in the world, Floyd Mayweather.

Justin paid a visit to the Ten Goose boxing gym in Van Nuys, California, where he had his gloves laced up by Mayweather, and he also had the privilege of doing some quality pad work with him. Justin also worked with another trainer in the gym, and filmed himself as he moved around the ring, working his combinations, upper body movement, and footwork.  He also snapped a couple of pictures of himself hitting the speed bag, and receiving other boxing instructions from Floyd as well.

Check out Justin Bieber and Floyd Mayweather getting busy in the boxing gym above.

Source: TMZ