Amy Winehouse is still in the hospital after a fainting spell on Monday sent her for a medical evaluation.
The singer's rep says that Amy's doctors have yet to figure out what's ailing the star, and that a medical team at the London facility where she's currently being treated is conducting more tests to get to the bottom of the mystery.
Amy is set to perform at the end of the month at both a London concert celebrating Nelson Mandela's 90th birthday and the U.K.'s Glastonbury music festival. Her rep insists the shows will still go on, but Amy's dad said that his daughter will remain hospitalized "as long as possible" until someone can figure out what the problem is.
Um, the problem is she's a crackhead. Dr. House has nothin' on me.