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A hard-partying starlet has no better friend than a heat wave like the one we've been experiencing in L.A., which provides a handy excuse for an on-set collapse that might otherwise raise suspicions that the swooning performer was brought down by the powdery Colombian monkey on her back. The Insider reports that a "overheated and dehydrated" Lindsay Lohan was taken to the hospital yesterday from the set of Georgia Rule, an incident immediately attributed by her quick-thinking flack to good, old-fashioned hard work in triple-digit temperatures:

The heat wave is getting to LINDSAY LOHAN. "The Insider" has learned that the 20-year-old actress was taken in a private car to an L.A. area hospital yesterday from the set of her new movie 'Georgia Rule.'

"She was overheated and dehydrated," Lohan's rep, LESLIE SLOANE-ZELNICK, tells "The Insider"'s MARC MALKIN. Sloane-Zelnick says the starlet spent a couple of hours in the hospital after being given a Vitamin B shot. "She was filming in 105-degree weather for 12 hours," she said.

Just moments before this official report surfaced, our inbox started to fill up with messages from some less charitable types claiming to have sources on the set who are already throwing around nasty phrases like "overdose" and "rushed to the hospital," which sound a lot worse than the leisurely, private car ride and fun Vitamin B-shot described above. We must ignore these totally unconfirmed rumors and ask: Have any of these gossipy people been outside lately? Even someone who hadn't recently snorted a Hefty bag full of blow could easily faint dead away without the extra help.