Risqué photos published by X17 and showing a "dazed"-looking (imagine!) Lindsay Lohan cavorting with a knife and a mystery brunette could cut short the esteemed career of the latter lass, who has since been identified as Vanessa Minnillo - aka the former host of TRL and ongoing gf of Nick Lachey. Minnillo's appearance in the pics follows unflattering talk that while wielding a mic for ET, she "was extremely high maintenance," as a source tells the New York Post's Page Six. "Vanessa wants to be a celebrity, not interview them. She wouldn't conduct post-[Grammys] interviews because she wanted to party," and thus irked her bosses to the point that she wasn't asked to cover the Oscars.

A rep for Minnillo insists to the Post, "[Vanessa] chose to leave ET because her contract expired. This is the first I've heard of any bad behavior."

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