Rajab Abdul Kahali (born 15 March 1991), popularly known by his stage name Harmonize, is a Tanzanian Bongo Flava musician and music entrepreneur. Also sometimes referred to as Konde Boy, Jeshi, Tembo, Mbunge, Konde-Mabeyo^[1][2][3] He is well known for his songs "Kwa Ngwaru",^[4] featuring Diamond Platnumz, and "Show Me" featuring Rich Mavoko.^[5] In 2017 MTV Base included him in their African edition of "Ones to Watch for 2017".^[6] He was the first artist to sign a recording contract with Diamond PlatnuHarmonize's four year relationship, and then marriage in 2019 to Italian socialite and entrepreneur, Sarah Michelotti was widely publicised. In 2020, one year after the exchanging of vows, it was announced that the couple had separated due to irreconcilable differences. It was reported that the split was caused in part by infidelity on the side of Harmonize which led to him fathering his first child out of wedlock. Since this point Harmonize has been seen by the public to be embracing his new role as a father. Just months later he publicly announced the beginning of a new relationship with Tanzanian actress Frida Kajala Masanja..

Harmonize's four year relationship, and then marriage in 2019 to Italian socialite and entrepreneur, Sarah Michelotti was widely publicised. In 2020, one year after the exchanging of vows, it was announced that the couple had separated due to irreconcilable differences. It was reported that the split was caused in part by infidelity on the side of Harmonize which led to him fathering his first child out of wedlock. Since this point Harmonize has been seen by the public to be embracing his new role as a father. Just months later he publicly announced the beginning of a new relationship with Tanzanian actress Frida Kajala Masanja