Naseeb Abdul Juma Issack (born 2 October 1989), popularly known by his stage name Diamond Platnumz (or simply Dee/Simba), is a Tanzanian bongo flava recording artist and dancer from Tanzania. He is best known for his hit song "Number One" which he featured Nigerian artiste Davido. Diamond has won numerous awards at Channel O and the HiPipo Music Awards. Diamond is considered influential among his fans, and is said to be the most loved Tanzanian artist at the moment. He was believed to be the highest selling Tanzanian artist of ringtones by mobile phone companies in 2013, as well as being among the artists earning the highest income in the African Great Lakes region's music industry.