Kosi O’s debut EP, ‘Kosi,’ was a clear statement of identity, rolling out in no uncertain terms the range of her textured vocals and, most importantly, her incisiveness when tackling subjects largely drawn from the heart. Traversing both R&B and Afropop has imbued her with the sonic versatility she needs to fully articulate everything she has to say about love. After a smattering of singles in 2025, she enters the new year with another heart-on-sleeve burner, “UNO,” a collaboration with Rigo Kamp.

With a “pun intended” title that carries dual meaning—“UNO” as in being someone’s number one, and “You Know”—the track immediately asserts itself as capable of charting the knotty web of love and desire. While the song is closely in tune with its singers’ emotions, the distinct pleasure of “UNO” lies in its breezy simplicity. It is a breathy, midtempo, lovestruck number in which Kosi is as yearning as a lover can be, throwing herself up as an unrelenting force as she pleads, over and over, to a passive lover: “Wait for me.”

Rigo Kamp takes full responsibility for smoothly crooning the hook, and his honeyed delivery brings something fresh and endlessly replayable to the formula. His luxuriant vocals and drive to explore all ranges of throwback sounds have made him a standout, placing him high among a new generation of artists mining Afropop’s history and stretching it into several exciting pockets. But with a voice like his, whatever he sings seems to reveal him as a true R&B loyalist, full of soul.

Listen to “UNO” here.