Floyd Mayweather and Justin Bieber are clearly good friends. Bieber has attended matches and walked to the ring with Mayweather in the past, and recently made an appearance at Mayweather's daughter's birthday party. That being said, the undefeated boxer has stepped up to defend his boy who recently came under fire for a racist joke he told 5 years ago.

Mayweather addressed the incident on Twitter, saying that Bieber has been nothing but kind to him and his family, and that we all make mistakes when we're young.

Peep the tweets above. Do you feel any kind of way about Bieber's joke? Sound off below.

Source: Complex