It got so ugly on the set of "Ugly Betty" between Lindsay Lohan and the popular ABC show's star, America Ferrera, that Lohan was cut from an agreed-upon six episodes to four.

One production source said, "It was a mess. Lindsay would show up every day with an entourage of people. She smoked 24/7, and after she left, they had to repaint her dressing room it was such a mess."

In addition, Lohan "would obsessively cut pictures of herself out of the tabloids like she was creating some sort of scrapbook and refused to go on set until America was there — it was a power play."

One episode, titled "Granny Pants," was about how Lohan, playing Betty's high school nemesis, would "de-pants" Ferrera. But Ferrera exacts her revenge and pulls down Lohan's pants instead. "Lindsay wasn't wearing any underwear," the source said.

But a Lohan pal fumed, "Bull [bleep]! Lindsay wears underwear all the time now. She was wearing a G-string. And it was America's fault. They were rehearsing the scene and America wasn't supposed to pull Lindsay's pants down — but she did. Lindsay was so embarrassed, she started crying."

Click here to read the full report from the N.Y. Post.