A project built on collaboration, Duets presented McEntire as both legend and peer among artists across genres. Morris co-wrote “The Only Promise That Remains” with Justin Timberlake, one of McEntire’s duet partners, and delivered one of the album’s most contemplative performances. The song’s unhurried melody and spare orchestration foreground McEntire’s narrative control, turning romantic endurance into lived experience rather than sentiment. In a record defined by musical partnerships, this piece stands out for its restraint, offering conviction without excess.