MGK just switched up his look in a major way — a transformation that comes weeks after his split from ex-fiancée Megan Fox ...

The change in the musician’s appearance comes months after it was rumored that he and Megan Fox broke off their engagement.

But if rapper-turned-country star Jelly Roll gets his way, they will mend their relationship ... “My heart is always to bring them (Eminem & MGK) together one day. I see so much more of them ...