Shereen catches up with the cast of the new Teenage Mutant Ninja Turtles movie, two Radio 1 DJs battle it out in the Slime Showdown, and Stanley is up on the roof for another game of Plops Away! There's cartoon fun with Grizzy, a trip to the Dropright Inn and music from Tilly Lockey. Saturday Mash-Up is totally live... so anything can happen! Show less