Lindsay Lohan got a nice Christmas gift from her father Michael Lohan this year-he revealed to her that she has a half-sister! 

LiLo took to her MySpace blog writing,"i have gone through a lot in my past, and to be completely honest, i am still going through a lot right now.. my father just let my family and i know, amongst others that he had another child after my little sister Aliana, or maybe he had it before Aliana?? either way, he cheated on my mother and that really sucks"

Yikes!  Lindsay continues and wishes some holiday cheer. "HAPPY HOLIDAYS AND MERRY CHRISTMAS EVERYONE! I love my mom, aliana, cody, michael, and my nana sullivan! i will be missing them this christmas as it is the first one i am spending away from home. i am spending it with Samantha in Los Angeles."