(Cover) - EN Showbiz - Amy Winehouse is proving her career is back on track after performing an impressive secret live set over the weekend.

The troubled singer has had problems with alcohol and drugs in the past and recently spent a week at The Priory clinic in London. Amy has been working on her new album for some time now and has decided to perform a series of shows across Europe in the next few weeks. On Sunday evening, the 27-year-old thrilled the crowd at the 100 Club in London with her sober and confident performance.

"Gone was the fragile, volatile and unpredictable Amy. She wasn't knocking back vodka on stage," a source told British newspaper The Sun. "Amy was on fantastic form. She looked and sounded great. It was like one of her old performances."

Amy - who has reportedly been banned from drinking alcohol while on tour belted out a host of her biggest hits including Back to Black, Rehab and Valerie. She was so relaxed on stage during the show she even entertained the audience by cracking jokes in between songs about her eventful private life.

"She had the crowd laughing along with her gags, poking fun at herself and dad Mitch," the source added. "She also threatened to flash her boobs and made a few jokes about her voluptuous look and holidays' in medical facilities."

Amy's boyfriend Reg Traviss was there to cheer her on during her show. The film director has been dating Amy for around a year and the singer's father is happy to see his daughter has found a reliable man.

"Amy's very loved up with Reg. I absolutely approve of him," Mitch said. "I hope the next couple of years hold a lot of happiness for my family.

"What Amy likes about Reg is that he looks like my father in the 50s at his age. He looks more like my father than I do. It's quite amazing actually. Although it's also a bit weird, isn't it?" (C) Cover Media