Heartbreak rarely respects the clock. It can remain manageable through the distractions of daylight, only to return once the room is dark, the phone is silent and there is nothing left to interrupt the mind. And on ‘Insomniac’, rising pop artist Zack Morris joins Caleb Hearn for an emotionally direct account of those hours when memory becomes louder than reason.
Marking their first collaboration to date, the single focuses on the restless period after a relationship has ended but its emotional hold remains intact. Throughout, Morris and Hearn write from within the quieter damage left behind: intrusive thoughts, recurring images and the inability to separate the comfort once associated with another person from the pain their absence now creates.
And it’s that contradiction that gives ‘Insomniac’ its emotional centre. The person who once made the narrator feel safe has become inseparable from the reason sleep no longer arrives. Loss is therefore a transformation in which familiar memories remain present but acquire an entirely different weight.
The pair’s decision to exchange perspectives helps prevent the track from feeling too enclosed within one narrator. Their voices suggest two people caught in related forms of grief, each recognising the same cycle of exhaustion and emotional return. The collaboration functions more as a conversation, even when the people they are addressing remain absent.
Produced and mixed by Dom Martinez, with mastering by Taylor Bialy, ‘Insomniac’ moves between close, reflective verses and a larger chorus designed to release the pressure accumulated around them. Atmospheric synths create a blurred late-night environment, while the production gradually expands without losing the intimacy of the lyric.
Following ‘Let Her Go’, the single continues Zack Morris’s interest in relationships, vulnerability and emotional growth. His work is increasingly defined by the contrast between polished, cinematic pop arrangements and lyrics that remain close to recognisable private experiences.
For Caleb Hearn, the collaboration offers a complementary role rather than a decorative feature. His presence broadens the song’s emotional field and reinforces the sense that heartbreak can produce different versions of the same sleeplessness. The result feels like a genuine meeting between two writers rather than a guest verse added for contrast.
‘Insomniac’ ultimately succeeds because it doesn’t confuse vulnerability with helplessness. Both artists admit that they remain affected, but the act of naming that condition already creates a small degree of distance from it. The song cannot force the night to end, though it can make the hours feel less private.
Atmospheric, melodic and carefully controlled, the single captures the strange exhaustion of missing somebody long after the relationship itself has stopped moving. Zack Morris and Caleb Hearn don’t offer a quick cure for the memories keeping them awake. They simply turn on a light and let someone else sit with them until morning.