"Amy is not in rehab," says the rep. "She was seeing a doctor who she regularly sees as part of her ongoing treatment. It was a regular appointment which she attends all the time. She has not checked in overnight."
The rep, who would not comment on the nature of the treatment, did tell PEOPLE in December that Winehouse was "under supervision for both physical and all health issues."
Last month's explanation came after the singer was photographed barefoot and wearing only a bra outside her London home. According to the rep, the treatment began when Winehouse canceled her tour in November.
"The tour was very hard on her – there wasn't [a doctor] on the road with her or anything, but she was not sleeping, on a tour bus, up late, driving from city to city, and it was hard for her," according to the rep. "She saw a doctor in London when she was here for the shows, and it was the doctor who said, 'You're not in a condition to continue touring.' "
'Even She Knows She Needs Help'The rehab reports followed the posting on its Web site by the U.K.'s The Sun newspaper of a shocking video allegedly showing the singer smoking crack.
Meanwhile, those close to the singer agree that she needs help.
"It's really sad. Everyone knows she needs help – even she knows she needs help," a music-business friend of Winehouse's told PEOPLE Tuesday. "The video is horrible but I hope it forces her to do something."
Whether the tape will finally prompt the "Rehab" songstress, 24, to rehabilitate herself remains to be seen. "I've lost count of how many times rehab has come up. You can't bring it up to her – she has to want to try and she just doesn't seem to," the friend added.
The videotaped incident allegedly was recorded just hours before Winehouse attended a court hearing for husband Blake Fielder-Civil, 25, who is awaiting trial on assault and conspiracy charges.
"People are tiptoeing around her because of Blake – it's like someone died," the friend said. "She's so crazy about him. When he first went to jail she couldn't function. She didn't know what to do with herself."
Winehouse's label, Universal Records, said in a statement, "We are deeply disappointed and upset by these latest revelations and are doing everything we can to offer Amy our full support in dealing with her problems."