American superstar Lionel Richie looks back on his long career in music, Radio 1 breakfast host Nick Grimshaw discusses his first compilation album and pop star Jessie J tells Alan about her new single Bang Bang, which also features Nicki Minaj and Ariana Grande. Singer-songwriter Ella Eyre performs Comeback live in the studio. Plus, Billy Howle, Jessie Cave, Jordan Stephens and Charlotte Spencer discuss their new roles in E4 drama Glue