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Was Lindsay Lohan such a nightmare on the set of Ugly Betty that producers cut her from a planned six episodes, down to just four?

It's true! according to the NY Post's Page Six, who says LiLo brought all kinds of crazy drama to the set.

The tab reports one source close to the production as saying, "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."

Plus, they say Lohan "would obsessively cut pictures of herself out of the tabloids like she was creating some sort of scrapbook and refused to go set until America (Ferrera) was there- it was a power play."

But there was even more on set drama:

In one scene Lohan's character was supposed to "de-pants" Betty and then she, in return, "de-pants" Lohan. But the source says LiLo wasn't wearing any underwear!

BS! says Team Lohan. "Lindsay wears underwear all the time now. She was wearing a G-String." Lindsay's pal then attacks Ferrera, saying it was her fault! "America wasn't supposed to pull Lindsay's pants down - but she did. Lindsay was so embarrassed, she started crying!"