Maria Marcus co-wrote “Undefined (CHAERYEONG),” a solo track performed by Chaeryeong of South Korean girl group ITZY. The song was released on ITZY’s 12th mini album Motto and explores the subtle tension of two people drawn to each other while their relationship remains undefined.

Maria also provided background vocals on the track, adding her vocal performance to the production.

Written by Maria Marcus, Lee Hae Sol, MINKYU and SEORA.