Apparently no one's seen Machete in this thread...
She had a body double for the nude scenes.
http://jezebel.com/5628779/those-arent-lindsay-lohans-nipples-in-macheteThose Aren’t Lindsay Lohan’s Nipples In Machete
When our tipster told us that Lindsay Lohan's character was naked most of the time she appears in Machete, nudity-watchers cried foul: It's a body double!
A reader emailed to say:
I saw Machete two days ago, and any part of the movie when LL's character was showing her nipples, it was obviously a body double. In those parts, she would never show her face and had shorter blonde hair in a different hairstyle. LL did have her long blonde hair covering her breasts if she was speaking in a scene and had to still be naked.
And according to internet luminary Mr. Skin:
There's nudity, but NONE of it is from Lindsay or costar Jessica Alba!
Our tipster sighs:
My message wasn't "OMG, you get to see Lindsay's nipples!" It was that Lindsay's part in Machete is hardly her comeback role and that her casting was a mutually parasitic, buzzy stunt that played off her tabloid persona. And she (as well her less-freckled, be-wigged nipple double who makes out with Danny Trejo) is still not wearing clothes much of the time she's on-screen — not that there's anything wrong that...
Mr Skin will have to wait, dick in one hand, mouse in the the other, until Inferno.
You've been warned!