Rajab Abdul Kahali (3rd October 1991) is a Tanzanian musician, songwriter and dancer who goes by the stage name Harmonize. He was born in Mtwara, Tanzania. He records for music label WCB Wasafi Record, which is under Diamond Platnumz leadership. He is well known for his hit song “Bado”, featuring Diamond Platnumz. He featured Rich Mavoko on his song “Show Me”. He was included in MTV Base’s “Ones to Watch for 2017” in Africa.
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, AFRIMMA and AEA USA (in the US).