WHY EMINEM DISS MACHINE GUN - KELLY

Eminem dropped a surprise 13 track album
"kamikaze".
In his track "not alike " he diss machine gun kelly.
read the lyrics in below
. But next time you don't gotta use TechN9ne if you wanna come at me with a sub - machine gun 
And I'm taking to you but you already know who the fuck you are,kelly
i don't use sublims and sure as fuck don't sneak -diss 
But keep commenting on my daughter hailee
I keep on telling mother****er,bitches ,in
Case you forgot 

So why em diss mgk:

. In 2012 machine gun kelly tweet about em  daughter Hailie

. Mgk saw a picture of hailie and said she       was hot. 

. That time hailie only 16 year old nd mgk 

   Was 21 .

  MGK has defended the tweet and even rapped  about it as recently as last year. But he's also  said it's affectd his career , causing "certain  people" in the industry to ignore his music.  MGK's music was banned from Sirius XM  (more specifically, Eminem's Shade 45  channel) after the tweet.