Rehab star Amy Winehouse is reportedly handing control of her $21 million singing fortune over to her parents. The troubled singer has been on vacation in St. Lucia since December following numerous health problems throughout last year, which included a stint in rehab and several long stays in hospital. Amy has been known to spend her money recklessly in the past, but in a bid to keep a reign on her vast savings, she is now said to have signed over controlling rights of her money to parents Mitch and Janis Winehouse. It means that Winehouse cannot make any major business decisions concerning her company, Cherry Westfield, without consulting them first. A source tells Britain's Sunday Mirror newspaper, "Everyone is pleased because it means Amy is listening to good advice. It's still her money and nobody else can touch it. But this stops her doing anything stupid. And it is evidence that Amy is really turning her life around." The singer reportedly signed documents that give her parents "articles of association," handing them shares in her company and voting rights that could restrict her actions. The source adds, "Mitch convinced Amy she needs a safety valve for the money for her own good, to stop her doing anything rash. She can be very impetuous and the family wanted to protect her. She cannot make a sudden decision. "Her dad was also worried she might be tempted to go back to (her jailed husband) Blake (Fielder-Civil) and put him in charge. That is now impossible. This would never have happened before, certainly not when she was with Blake. It's her money and nobody else can touch it. But she can't do anything stupid."