Machine Gun Kelly and Megan Fox don’t seem to be bothered by Brian Austin Green seemingly shading their relationship.The “Bad Things” rapper, 30, shared a video via Instagram on Thursday, August 6, of himself and Fox, 34, listening to his new song, “Concert for Aliens.” Kelly and the Transformers star mouthed the lyrics as the “Candy” rapper starts to headbang. Fox, meanwhile, throws her head back and smiles.“Who’s coming to the Concert for Aliens??” Kelly captioned the post.