so im looking for a fic where a princess Kagome is forced to hide her face because her sister and mother are jelly of her beauty. well at a ball her parents have, Kagomes mask comes off somehow, and sesshomaru falls in love with her

Sounds like Perfection by Kiba (NC-17 on Spark, MA here)
www.dokuga.com/spark/story/3474/1
*Complete*Kagome has been kept a secret for her whole life; she knows why too. She only has a few friends from the village near her mother's home and she's not suppose to have them. That's not the reason though the reason is because Kagome is perfect to everyone but herself. Her scent, her looks, and her well everything is to prefect for her mother's taste. So her mother Yukena (U- keen-a) hides her away wanting only her daughter Kikyo to be known. Kagome go out one night and cries to the stars ...

thats not it but something like that! thanks!
i know for one reason- kagomes father is alive, recuse i remember he was the reason she was allowed to go to the ball!

i think i found it!
behind the mask lays beauty
by hinomoto!

EDIT BY WICCAN: This story is on 'Spark, rated R, here is the link: http://www.dokuga.com/spark/story/3345/1

There's a few more chapters of it on ff.net

Behind the Mask lays beauty
Chapters: 11, Rated: T (at least on ff.net)