Katie Holmes is reportedly dating a jazz musician. The 34-year-old actress - who has been single since her marriage to Tom Cruise ended nine months ago - has been on a string of dates with Peter Cincotti, 29, though have been arriving and leaving venues separately to avoid raising suspicion. A source said: 'It's early days but Katie and Peter have been on quite a few dates. 'They met up two weeks ago at the New York Observer's 25th anniversary party. They have a lot in common - he's a total stage buff.' The couple have known each other for a few years but only started dating recently, though the singer-and-pianist has already been given the seal of approval by...