Lindsay Lohan has come under fire from bosses at an exclusive U.S. boutique - after she allegedly demanded $15,000 in free gifts despite failing to properly promote her in-store leggings range.

Reports surfaced earlier this month that the Mean Girls actress was fuming after a store assistant at Los Angeles' Kitson refused to allow her to go on a hefty spree without charge.

And bosses at the retail outfit aren't letting the tantrum go without punishment - they have slammed the star for her demanding ways, and insist she should be grateful they are still stocking her 6126 leggings range.

A spokesperson for Kitson tells Fox News, "We're actually really offended. The tables have turned and now we're the customer.

"We spent $50,000 on her leggings line, but she hasn't come to the store in three years, and she didn't even do a personal appearance.

"She should have brought cookies for the staff to thank them for selling her leggings because she does nothing. We don't know if we'll continue to carry them."

Last year, Victoria Beckham also felt the wrath of Kitson - the store dropped her DVB denim range after it failed to sell.