Katy Perry is “incredibly embarrassed” that she fell for John Mayer only to be kicked to the curb by the notorious ladies man after just two months of dating.

The “Wide Awake” singer was anything but when she allowed herself to be duped by the renowned womanizer. John — a kiss-and-tell serial celebrity dater — has bedded the likes of Jessica Simpson, Jennifer Love Hewitt and Jennifer Aniston. He aggressively pursued Katy until she finally gave in… only to dump her a few weeks later.

The former couple attended a mutual friend’s party last week, but barely blinked at each other for the entire evening, a spywitness squeals:

“It was so weird! Katy stayed in one room the whole night and John stayed in the other and when they passed each other they both just kept their heads down. It was like they had this incredible animosity for each other and everyone else at the party could feel it. You could cut the atmosphere with a knife. It was all incredibly high school!”

A chatty pal dished the deets on Katy’s fresh heartbreak to RadarOnline:

“Katy fell hook, line and sinker for John, so when he broke it off she was ultimately surprised and incredibly embarrassed. She’s ashamed that she got played — it was the classic ladies man move, he added another notch on his bed post. He charmed Katy, got what he wanted and moved on.”

Katy’s divorce from funnyman Russell Brand — a former sex addict (Do we see pattern?) was finalized in June. Concerned friends and family tried to warn the newly-single singer off of John — to no avail.

“…Katy really liked John, she thought their relationship was the real deal, especially after he told her he wanted to put an end to his womanizing reputation and was thinking of settling down…Family and friends did their best to dissuade Katy from hooking up with John because they were concerned that he was going to treat her like his other conquests.”

Country singer Taylor Swift famously penned a song — “Dear John” — about John’s deplorable treatment of her after their breakup. Think Katy will do the same?

(Note to John: Stick to dating actresses!)

Written by Castina on August 26th, 2012 | Tagged as: John Mayer,Katy Perry