@justinbieber / Instagram 1 / 8
@justinbieber / Instagram 1 / 8

Justin Bieber is used to taking jabs and uppercuts from fans and media. Now, he can fight back. Literally.

The "Girlfriend" singer posted several photos of himself training with prized boxer Floyd "Money" Mayweather Jr. on Thursday night.

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"@floydmayweather is my trainer," Justin wrote on a photo posted to Instagram what shows the boxer helping him lace up his gloves. In a video also posted to Instagram, Justin is seen hitting the pads with Floyd and working on his defense, something Floyd, the welterweight boxing champion, is masterful at.

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Two more photos of the training session were posted to Justin's Shots account, and three videos were posted to his Vine account. Talk about knocking out all social media forums!

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For many, the pairing of these two may seem strange, but the two are actually close friends, with Justin often escorting Floyd to the ring during his championship fights. Before one of Floyd's fights in May, the two were seen getting pedicures together.

These two are quite the 1-2 combination.