Mariah Carey, Nadiya Hussain, Tim Peake, Richard Osman, Gary Barlow

Joining Graham tonight: music superstar Mariah Carey, promoting Mariah Carey's Magical Christmas Special; TV chef and writer Nadiya Hussain, whose new book is Nadiya Bakes; British astronaut Tim Peake, talking about his autobiography, Limitless; and singer-songwriter Gary Barlow, who chats and performs Incredible.