Rajab Abdul Kahali (born 3 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 Konde Music Worldwide, He is well known for his hit song "Uno, Bedroom, Fall in love and many more".He was included in MTV Base's "Ones to Watch for 2017" in Africa.