By Seamus Duff Lulu was a guest on Lorraine on Wednesday leaving TV and music fans united in disbelief over her unexpected age. The Shout singer was a guest on 64-year-old Lorraine Kelly’s morning ITV talk show where she dropped the bombshell news that her upcoming tour, titled Champagne For Lulu, will be her last. Flabbergasted, Lorraine didn’t want to believe that her friend is set to hang up her microphone. But Lulu insisted the time was right for her to walk away from performing live as she is now well over the retirement age – a fact that neither Lorraine nor her audience could quite acce…