Maria Marcus co-wrote and recorded backing vocals on “Stone Cold”, performed by Mina as her solo stage during TWICE’s THIS IS FOR World Tour. The song was first introduced live during the tour in July 2025, giving fans the chance to experience Mina’s striking solo performance months before its official release.

“Stone Cold” became a standout moment in the show, showcasing a darker and more atmospheric side of Mina as a performer. The song was later released as part of TWICE’s special album TEN: The Story Goes On, bringing a memorable live performance to the group’s official catalogue.