Rajab Abdul Kahali (b. March 15, 1994) is a Tanzanian musician,[2][3][4] songwriter and dancer who goes by the stage name Harmonize. He was born in Mtwara, Tanzania. He records for music label WCB Wasafi Record,[5] which is under Diamond Platnumz leadership. He is well known for his hit song "Bado",[6] featuring Diamond Platnumz. He featured Rich Mavoko on his song "Show Me".[7] He was included in MTV Base's "Ones to Watch for 2017" in Africa.[8] 

 Harmonize is currently managed by Joel Vicent Joseph​ who is also a musician and and Actor


He started his music career in 2011. His first recordings did not hit. In 2015, he met Diamond Platnumz. His first song "Aiyola" was commercially successful. He won three awards from WatsUp Tv,[9][11] AFRIMMA and AEA USA (in the US).[2]


Song titleYear
"Bado"[6] ft. Diamond Platnumz2016
"Happy Birthday"2017

Awards and nominations

2016Bado ft. Diamond PlatnumzWatsUp TV Africa Music Video Awards for Best African New Comer VideoWon[2]
HimselfAfrican Muzik Magazine Awards (AFRIMMA) for Best New ComerWon[2]
African Entertainment Awards (AEAUSA) for Best New ArtistWon[2]