As you may have noticed, there are plenty of egos in the music industry.
To be honest, you can't really blame some, because their record sales, popularity and success speaks for itself, but now and again you really can't help but say: "Wow, what a knobhead."
This, presumably, has been the case for you at some point with Justin Bieber.
At only 23, the Canadian singer has been embroiled in his fair share of controversies, a lot of them stemming from the fact that he's become a self-entitled, spoiled brat since bursting onto the scene.
His latest brattish behaviour has come at the expense of fellow musician Marilyn Manson.
Bieber wore a t-shirt with Manson, real name Brian Hugh Warner's face on it, while performing last year. In response, Manson wore a Justin Bieber top on stage.
After the back and forth, the Canadian created copies of the Marilyn Manson shirt and sold them as merchandise, replacing Manson's name with his own, claiming that the pair had agreed to him 'reinterpreting' the shirt and selling it for $200 (£150).
Manson has since called Bieber a 'piece of shit' and revealed that the singer told him that he's the reason he's relevant again.
"He was [already] wearing the shirt that had his name on my shirt, and he said to me, 'I made you relevant again'," he told Consequence of Sound.
"Bad mistake to say to me. He was a real piece of shit in the way he had the arrogance to say that. He was a real touchy-feely guy, too, like, 'yo yo bro!' and touches you when he's talking. I'm like, 'you need to stand down, you're dick height on me, ok? Alright? So stand down son.'
"The next day I told him I'd be at his soundcheck at Staples Center to do 'Beautiful People'."
It wasn't all bad, though, as the singer claims that he took all the money from the sold shirts, and he didn't even have to argue to do so.
"They didn't even fight, they were just like, 'yea, we already know, we did wrong, so here's the money'."