Apparently she was inspired by Paris Hiltons topless cover.

http://femalefirst.co.uk/celebrity/63442004.htm

Lohan shot the top secret cover photo on a beach in Malibu, California last week - and it was actually her idea to pose naked. A source says, "It was Paris Hilton's recent Vanity Fair cover, where she's topless and covering her breasts with her arms, that inspired Lindsay to push the envelope even further."

She was better when she wasn't as skinny and had big boobs.

Now she's like anorexic and looks nasty as shit...it's disgusting.

Maybe she will pose nude on the Halloween edition.