Greg James and Dotty are joined by Jason Derulo. On top of his hosting duties and two live performances, Jason also introduces performances from US singer-songwriter Charlie Puth and UK singer-songwriter Jessie Ware, as well as featuring in a fun sketch. Greg interviews Jason and the bands and appears in a special sketch featuring a guest appearance by Foo Fighters' Dave Grohl. Dotty chats with the guests, keeping across the social media streams at #SLFN and getting out and about meeting music fans across the country.