Justin Bieber took to Instagram this week to criticize rapper Eminem for dissing young rappers on his 'Kamikaze' album - and Eminem doesn't care what Bieber thinks.

“Eminem really doesn‘t care how Bieber feels about his flow and laughed when he saw what Justin wrote about him online,” a source close to Em told Hollywood Life. 

“Em is not crazy about Justin‘s music, it ain’t for him, so he doesn‘t care how he feels about him or who he disses. Em has also dissed Justin in the past and will probably make fun of him again. He is not too mad or scared of Justin and not worried about some war or feud with him. Eminem can take it as well as he can dish it, so it is all good.”

 “I just like Em’s flow but don’t like that he’s dissing new rappers. I like the new generation of rap he just doesn’t understand it,” Bieber wrote via his Instagram story. Bieb better be careful before he finds himself the victim of one of Eminem's deadly bars.