Today in Britney's Urine: According to celebrity drug-test verification concern Thirty Mile Zone Urinanalyis Solutions Ltd., the narcolepsy medication Provigil did not trigger a reported positive result by the embattled pop-star, though it may have contributed to Spears unexpectedly taking a five-hour nap in the middle of a sales pitch for a new Mercedes she recently attempted to purchase at a Beverly Hills showroom. [TMZ]