All those long nights might finally have caught up to Amy Winehouse.
The beehived singer has been hospitalized in London to undergo tests after fainting at her home Monday afternoon.
Winehouse's rep, Tracey Miller, confirmed the incident to E! News, adding that the singer "may be kept in overnight for observation."
Per Miller, the 24-year-old's manager's assistant was "fortunately" with Winehouse at the time and managed "to stop her falling."
"She quickly recovered and her father Mitch took her to the hospital as a precaution."
Meanwhile, another Winehouse rep told the BBC that Winehouse was "doing admin" at the time of her fainting spell.
The "Rehab" singer apparently had planned on signing autographs for a group of die-hard Canadian fans who had congregated outside her Camden home for most of the day, only to discover they had already left the premises. It was then that she fainted.
Winehouse is currently undergoing tests at the London Clinic in the Marylebone section of the city, and per Miller, doctors remain "unsure of the cause of the incident."