What happens when you leave the talent choices up to a hat? 🎩👀 Watch these Britain's Got Talent stars pick a mystery item and perform whatever challenge comes their way! ✨ Rafferty Coope - Magician 🪄 Matty J - Singer 🎤 Ted Hill - Comedian 🎭 Saturday Mash-Up! is CBBC's live show where anything can happen, featuring Joe Tasker, Shereen Cutkelvin and Stanley the Monster, plus celebrity guests, hilarious challenges, cartoons and, of course, plenty of slime! #SaturdayMashUp!