Katy B and The Vamps will be among the acts involved in CBBC's The Big Performance this year.
The show is returning to CBBC for a third series later this summer, and will see The Choir's Gareth Malone challenging six of the UK's most talented children to produce a performance that marks the centenary of the First World War.
Pixie Lott, Conor Maynard and Eliza Doolittle will also help the 11 to 13-year-olds with writing and performing a song that celebrates the memory of their ancestors, ahead of the finale on August 4.
Melissa Hardinge, executive producer for CBBC, said: 'We are delighted that Gareth Malone is back on CBBC, inspiring a new group of children with this extraordinary songwriting challenge for the World War One anniversary.
"We hope that the series will encourage our young audience to trace their own family histories, and understand the importance of the international commemoration on August 4."
Previous series have seen Malone bring shy young people together to sing in front of millions at Children in Need and Proms in the Park.
Watch Katy B's video for 'Still' below:
