One of Maino's former loves......singer Amy Winehouse, struggling to overcome drug addiction, was booed at an open-air concert as she appeared to be too drunk to sing at the performance that officially kicked off a two-week European tour. Some 20,000 people gathered for the highly-promoted concert in Belgrade late Saturday, but many soon left the concert. During the concert which lasted about 90 minutes Winehouse could only mumble some of the lyrics. She left the stage twice, while many fans booed and whistled as she tried to find a proper note, with her band trying to calm the crowd.  Let's hope Serena Williams return to tennis goes much smoother.