Round one was Jennifer Aniston vs Angelina Jolie...
But now it's time for John Mayer and Brad Pitt to step into the ring.
Johnny has taken a swipe at Bradley with a rather strange home video.
In the clip, the singer parodies the Oscar nominated actor's motivational lecture performance in The Curious Case Of Benjamin Button.
He starts off by saying: "You're a man of strength, charisma, girth, honour, girth... and influence. You know, like that guy in the movie The Curious Case Of Benjamin Brat. Benjamin Brat, the older you get, the younger you get."
Funny stuff, but a little bit childish don't you think?
The swipe comes after his girlf's verbal battle with Angelina, with Jen branding Brad's lady, "uncool".
Since then, Jen has been speaking out more openly and jokingly about her ex and his raven-haired lover.
So now all we're waiting for is to see what punch Brad will pack.
Although, it's unlikely that he'll say or do anything at all - he's just not that kinda guy.
Mind you, the thought of these two having it out... well, that's delicious.
