Geri Horner has revealed she has lost her pet dog Daddy after 18 years together, sharing a tribute to the pup on her Instagram.The former Spice Girl told fans how her pet had kept her from feeling lonely and how he was her first baby before she welcomed daughter Bluebell in 2006. She wrote: "Goodbye to my special little friend, Daddy the dog." Get exclusive celebrity stories and fabulous photoshoots straight to your inbox with OK!'s daily newsletter.