In 2015, Carla continued her music career as a member of Kids United, a child musical group formed as part of a campaign of Unicef France with the intention of covering "the most beautiful songs celebrating peace and hope". She was 12 when the group's first single, "On écrit sur les murs", became a hit. The debut album followed in November, debuting at number 9. Both would linger in the French charts for months, eventually, in February 2016, hitting, respectively, number three and number one.
