Choirmaster Gareth Malone is back, this time with a Big Performance of historical significance. Six of the UK's most talented young singer-songwriters have been chosen to represent the nation at a World War I centenary event. All six young musicians will write a song as a tribute to mark the occasion, but only one will be chosen by Gareth for the group to perform together on the big day.

The music maestros must dig deep for their next song writing challenge. They had success writing an upbeat song for Eliza Doolittle but their next writing task pushes them emotionally as well as technically, and pop megastar Pixie Lott will judge their creativity. Can they write a moving song based on her hit ballad Cry Me Out?

To help put genuine emotion into their song Gareth wants the group to draw on their own life experience. For one of the soloists, Sid, it's the memory of his dog dying that pulls on his heart strings but can the joker of the group be serious when it counts?

The kids step back in time to attend a 1914 school lesson and get a greater understanding of how World War I impacted those at home. Gareth takes Sam and Molly R on a trip to the Imperial War Museum to find out more about their ancestors in the war and has a surprise himself. All the kids are beginning to feel a bigger connection to the war, but are their commemorative songs heading in the right direction? Molly R and Sam test run theirs in front of a rather prestigious audience.

With Pixie on her way, there's just enough time for a last minute music session with soloist Sid - he's got the lungs for a solo but can he deliver real emotion in his performance? Pixie has high expectations for their soulful ballad. Show less