Though she "quickly recovered" from not feeling well, the soul diva, 24, did require her manager's assistant "to stop her falling" in her home, her rep said, according to the BBC. The singer's father, Mitch Winehouse, accompanied her to the hospital "as a precaution," according to the rep.
He told PEOPLE: "She's fine. It was a brief thing and they took her in as a precaution. Her Dad drove her to a private hospital, but they're unsure what caused it so aren't taking any chances."
Doctors at the London Clinic in Marylebone have not diagnosed her condition or determined what might have caused her to faint, the BBC reports.
Winehouse apparently passed out after she was about to sign autographs for some Canadian fans who'd been waiting outside her home all day. When she went to see them, said her rep, she discovered they had gone. It was then that she fainted.