Lindsay Lohan: Ok, It's Time for Me to Pay Shawn Holley

Lindsay Lohan is telling friends she was clueless until a few days ago that she owed Shawn Holley a small fortune in attorney's fees, but we're told now that she knows she's putting Shawn at the top of her creditor's list.

It's hard to swallow ... that Lindsay didn't know how much she owed Shawn. We've been reporting for weeks it's in the 6 figures. Sources quite familiar with the situation tell TMZ, Lindsay owes Shawn $150,000.

It's interesting ... although Lindsay fired Shawn ... our sources tell us she's been making a full-court press for more than a week to get her back, but Shawn isn't having it.

We're told Lindsay has instructed her business manager to pay the tab ASAP. Lindsay is making money from appearances, endorsements and some acting gigs, but she's been spending like an insane woman -- first class plane tickets, expensive hotels, restaurants, clothes, etc. Lindsay says she'll cut back so Shawn gets paid.