John Mayer is one of those celebrities known for saying exactly what he thinks. Sure, sometimes it gets him in trouble. Yeah, we're talking about his "my d*ck is a white supremacist" comment, and how he publicly revealed sexual details of his past relationships. Let's just say Mr. Mayer's mouth can be problematic for him at times.
That outspoken nature plays out on social media as well, and he showed it off recetnly while trolling Justin Bieber. Bieber and girlfriend Hailey Baldwin got engaged not too long ago, and they have been celebrating all over social media. Bieber even posted a picture of them kissing in a hot tub.