John Mayer always looks like he's taking a crap whenever he's on stage. But it's one of those craps after you've been constipated for a while and it feels really good to release a torrential stream of caca in your toilet bowl.

He can poo on us anytime, though!

The rocker with a penchant for big-boobied bimbos performed at the Live Earth concert in New Jersey on Saturday. He joined The Police on guitar for the last song of the night, Message In A Bottle, where his facial pooing was doubled - cuz he was playing with one of his heroes.

Mayer has been fashioning himself an eco champion for some time now.

Click here to read his blog entry on Live Earth.