Gaby Roslin paid tribute to her BBC colleague Zoe Ball this morning, following the heartbreaking announcement from the radio presenter that her mum had passed away. Zoe took to social media in the early hours of April 24, to confirm that her beloved mother, Julia, had died following a battle with cancer.The 53 year old Radio 2 DJ shared a sweet throwback picture of her mother, captioning it: "Sleep tight dear mama.