Amy Winehouse Returns To Rehab

(CNN) -- "Back to Black" singer Amy Winehouse is back in rehab, a rep for the Brit star confirmed.

Winehouse "has embarked on a treatment program at the Priory Clinic," her rep tells CNN.

A source close to the "Rehab" singer told People magazine that it was Winehouse's father who helped her seek treatment.

"Her dad sat her down and said 'I think you're drinking too much again.' So she agreed to [get] an assessment to stop it [from] becoming a bigger problem," the source said.

The friend adds that "She's determined, and this is all off her own back...It's just a lapse. There are ups and downs on the road, and there have been mostly ups recently. But this is a down and she's done the right thing and gone to rehab."

The Grammy-winning singer has a history of battling drugs and alcohol, and previously entered a rehabilitation facility in January of 2008.

Winehouse's rep tells CNN that "she wants to be ready for performances in Europe this summer and decided to seek an assessment. She will remain at the Priory on doctors' advice."