Amanda Holden and Ronan Keating introduce tribute performances of the pop duo's songs, marking the 40th anniversary of the release of their first LP. Ronan, Dionne Warwick, Beverley Knight, Chrissie Hynde, Noisettes and the Saturdays are among the acts performing new versions of hits including I Won't Last a Day Without You, Close to You, We've Only Just Begun, Goodbye to Love and Please, Mr Postman. Jamie Cullum also teams up with Girls Aloud's Kimberley Walsh for a duet of Rainy Days and Mondays, and Richard Carpenter reveals the secrets behind his and sister Karen's success. In addition to this, clips of original performances combine with behind the scenes interviews as the artists develop their new take on the unique Carpenters sound.