GEM, bauergriffinonline.com Sigh. Amy Winehouse's ongoing struggles with substance abuse are far from over, as the singer has checked into rehab once again. Winehouse's representatives confirmed that she "has embarked on a treatment program at the Priory Clinic. 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." The Priory Clinic is a London facility that has helped other celebrities such as Ronnie Wood and Kate Moss. Allegedly, Amy's father Mitch Winehouse was the one who urged her to once again seek help. Mitch recently told Spinner that ""She doing better now. She has been clean for two and a half years, about that. I'm not saying her problems have gone away, because they haven't. She's dealing with it." And, according to the ever-reliable UK tabloids, a "friend" said that Amy downed a small bottle of Smirnoff vodka on the way to the clinic. In lieu of adding on to the tired punch lines, we'll just say we hope it works out for her this time.