Here is his exchange with Lily Allen on Twitter this evening:

perezhilton: @lilyroseallen Is casting the music video for her next single, which she's shooting in LA. Tell her U think she should have Perez in it! Ha!

lilyroseallen @perezhilton: oh , I'm sorry , we've already cast the jealous and bitter lonely old queen role. Next time eh ?

perezhilton @lilyroseallen: Jealous of who? David Beckham, maybe. And if I wanted to be a fucked up Brit, I'd rather be Amy Winehouse - whose got talent.

lilyroseallen @perezhilton: god, you're like so obsessed with me its embarassing.

perezhilton @lilyroseallen: Congrats on your album doing well in America, though. It's REALLY HARD to sell copies when u discount it to $3.99. Desperate!

lilyroseallen @perezhilton: its also number one everywhere else in the world douchebag. Go away you little parasite.

perezhilton @lilyroseallen: Aw, u can see I've lost weight! I am a littler Perez. But I'm still a big fat cunt - just like U! That's why I lova ya. xoxo

perezhilton @lilyroseallen: P.S. Thanks for advertising on my website. I'll take your money (or the label's) anytime!

lilyroseallen @perezhilton: I know you will, and that's what makes you a cheap ass whore. Now leave me alone, stop following me, I'm working. Bye x x

perezhilton @lilyroseallen: It's not fair and I think you're really mean! You're supposed to care! It's not fair and it's really not ok.

lilyroseallen: hes blocked, just had to get to a computer

perezhilton @lilyroseallen: I can still read what you write, twat!

He actually called her a "big fat cunt". Lovely