Listen to Letter to Yvonne Okoro (feat. Kelvin Black) online. Letter to Yvonne Okoro (feat. Kelvin Black) is an English language song and is sung by Criss Waddle. Letter to Yvonne Okoro (feat. Kelvin Black), from the album Letter to Yvonne Okoro (feat. Kelvin Black), was released in the year 2017. The duration of the song is 3:51. Download English songs online from JioSaavn.