Lindsay Lohan Caught Doing Blow on Film?

That's my guess - yes, it's an obvious one.

From PageSix:

"Lindsay Lohan just can't seem to stop partying - and, unluckily for her, word on the street is that someone may have recorded her revelry with a cellphone video camera. We can't divulge what Lohan was allegedly caught doing, but if true, it won't sit well with her younger fans. Apparently, all the naughtiness went down last week at a party at a private house in Beverly Hills that was also attended by her frenemy Paris Hilton, shipping heir Stavros Niarchos and Ryan Seacrest. At one point, the party was disrupted by a huge rat that ran into several rooms, causing revelers to scream, drop their drinks and run, until Niarchos kicked the rodent out onto a balcony. A rep for Lohan told Page Six, "I have not heard of this."'