>> Since he joined Emanuel Ungaro in 2007 at 23, all has seemed well between the troubled house and Esteban Cortazar — no rifts or tiffs to be reported.  Not so any longer — and Lindsay Lohan may be to blame.

According to several of Page Six's sources, Lohan is currently in Paris, talking to the house about signing on as a creative consultant, and Esteban is not happy: "Esteban is threatening to leave the company if they bring Lindsay on as a consultant. It has been a revolving door of designers there and if he leaves, his team will go with him."  Management, on the other hand, "thinks Lindsay is going to bring the company new energy and new buzz."

It's not that Cortazar isn't open to the creative influence of young blood — his Fall 2009 inspiration board was full of pictures of Rumi Neely of Fashion Toast, who he invited to his studio and Fall 2009 show — it's just that, as Page Six's "fashion insider" said: "[Lindsay] is going to be the nail in the coffin. Nobody will take them seriously ever again."