Brad warns John ‘LEAVE JEN ALONE... OR ELSE!'

Eek! Mayer the Player is back on the scene

Leave it to John Mayer to come crawling out of the woodwork when he sees one of his exes settling down! The notorious lothario is making a play for his former fling Jennifer Aniston after learning she’s “deliriously happy” and starting a family with Brad Pitt.

“John panicked when he realised things were serious between Jen and Brad, and convinced himself that she was his one that got away,” reveals our exclusive insider. “So in true John fashion, he engineered an innocent catch up between them to gauge where she’s at with Brad.”