George Clooney’s Girlfriend Denies Slamming Jennifer Aniston

 Fotonoticias/WireImage.com; Theo Wargo/WireImage for Ray-Ban; Stefania D'Alessandro/Getty Images

Blame it on Twitter.

George Clooney's girlfriend Elisabetta Canalis has been accused of slamming Jen Aniston on Twitter — by comparing Aniston to scrawny, bug-eyed rocker Iggy Pop — but she says it's all a misunderstanding.

The Italian model and actress Tweeted on Tuesday: "I JUST READ ON GOOGLE That I TWEETED something bad about J Aniston,let me be clear,it's a complete LIE,I would never do that!!" (A rep confirmed to UsMagazine.com that the account is bonafide.)

The real story? On Monday Canalis re-tweeted someone else's catty comparison. Originally written in Italian, the dis read: "I'm browsing again through the pages of Rolling Stone. Iggy Pop on the cover looks exactly like Jennifer Aniston."

Canalis said she had "problems" with micro-blogging site Twitter. "I was at the beginning, not sure what 'retweeet' meant," she explained.

She added — with typos — Wednesday: "But I don t know what to do with somebody who doesn t understund that it was a MISTAKE to retweet what SOMEBODY ELSE wrote ok?!?"

Canalis, 31, has been dating Clooney, 49, for almost year.

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!