Ouch! Talk about the pot calling the kettle black! And Brandon Davis might want to work on his spelling and grammar as well!

Mischa Barton may not be the same size she was in early 2009 (remember how tiny she was back then?!), but she's certainly not the fattest person on the planet!

After running into her at the Nylon mag party at Trousdale on Wednesday night, Mischa's douchey and greasy ex-boyfriend tweeted the nasty message above, and though he's since removed the tweet, the damage is already done!

She may not be quite what she used to be, but we're SO on team Mischa!