Jamie Oliver was one proud father on Saturday as he marked his daughter Daisy Boo's 18th birthday.MORE: Jamie Oliver's wife Jools shares adorable picture of her 'baby'Taking to Instagram, the celebrity chef shared a gorgeous black and white photo of his second eldest daughter as she blew the candles on her impressive birthday cake.Alongside the picture, Jamie wrote: "Happy 18th birthday to my second child Daisy xxxx Where has my little girl gone?? What a journey it's been! You're such an amazing