Bynes took to her Twitter.com page on Thursday (11Apr13) to take aim at Hilton, who has regularly reported about the embattled actress' erratic behaviour and legal woes in recent weeks.
The Hairspray star accused Hilton of using unattractive snaps of her on his website, and tried to exact revenge by sharing a picture of him looking less than his best to show his readers "how much hotter I am than you".
She raged, "I'm so sick of you saying you're sincerely worried about me. At least pick a photo from my Twitter if you won't stop talking about me. Leave me alone! You are the scum of the earth!! Pick better photos f**ker! Perez Hilton is ugly, has never had a hot boyfriend. He makes being gay look bad! No one wants to be a single parent bc (because) no man wants them..."
Hilton appeared to take her rant in his stride and uploaded an old snapshot of himself and Bynes posing together, writing, "Look at how fat I was in this pic! Wowsa (sic)!"
He also tweeted, "How can you ignore someone who won't stop saying 'Look at me!'? You can't. Especially when they're saying 'Look at me!' very loudly!"