"And so I then said, 'That's it, no more. You can write whatever you want - I won't do it. I will never take my clothes off on this show again.' and I didn't."
Evangeline also admitted she clashed with producers and writers over the direction the series took her character in, and particularly hated the "obnoxious" love triangle between Kate, Jack Shephard (Matthew Fox) and Sawyer (Josh Holloway).
She said: "At the beginning, she was kinda cool, and then as the show went on, she became more and more predictable and obnoxious.
"I felt like my character went from being anonymous - really having her own story and her own journey and her own agendas - to chasing to men around the island and that irritated the s**t out of me.
"And I did throw scripts across rooms when I'd read them because I would get very frustrated by the diminishing amount of autonomy she had and the diminishing amount of her own story there was to play."
And the actress admitted she felt the character deserved "better" because she was such a strong female presence.
She added: "I wanted her to be better, because she was an icon for strength and autonomy for women, and I thought we could have done better than that.
"The great thing about that is that she was flawed, and that's so important.
"If you don't have flaws in the women on screen, then what you're telling the world is that women have perfect if they're going to be lovable. And if you have flawed women on screen who are also icons of femininity, who are also beloved, then it gives us all permission to be flawed."