John Mayer cheats on Jennifer Aniston with jet speed!

Serial smoocher John Mayer has already cheated on Jennifer Aniston,

reports The National Enquirer.

hours after the pair’s hook up in Miami, John took a plane to the Big Apple,  John was hiting on a blonde in a club.

“John kissed Jen goodbye in Miami, hopped a plane to New York City, walked into a club and hit on a hot blonde.”‘

A source told The Enquirer.

“He’s the king of cads.

 Jen was stunned when word got back to her,

but she’s so hot for John she’s choosing

to overlook the incident.”

The insided continued,

“John had a whole entourage of loud

and aggressive guys with him and they

were definitely on the prowl.

John is a dog, pure and simple.”

After jetting from Miami on April 28th,

John entered The Butter Nightclub and

attempted to get a blonde to go home with him.

“The poor girl was soaking wet from the rain,

and she was clearly annoyed by how aggressive

John was acting.  

She blew him off.”