Naseeb Abdul Juma Issack, professionally known as Diamond Platnumz, is a Tanzanian bongo flava recording artist, dancer, philanthropist and businessman. He is the founder and CEO of WCB Wasafi Record Label, Wasafi Bet and Wasafi Media. Diamond has gained a massive following in East and Central Africa. He became the first Africa-based artist to reach 900 million views on YouTube. After signing a record deal with Universal Music in 2017, Platnumz released his third studio album, A Boy from Tandale (2018). In 2021, Diamond together with his record label WCB Wasafi entered into a 360 Partnership with Warner Music Group.

He started his music career in 2006 at the age of 18 years old while selling clothes. He would record songs with the money he earned from the clothes' business and eventually recorded his first single "Toka Mwanzo", a Bongo flava song fused with R&B. The song was not successful commercially. His breakthrough hit single "Kamwambie" was released in 2010. The song won three Tanzania Music Awards. He then released his debut studio album Kamwambie same year in 2010. In 2014, Platnumz earned a nomination at BET Awards 2014 for Best International Act: Africa. Platnumz has frequently collaborated with videographer Director Kenny for his music videos. The music video for "Waah", directed by Kenny, was nominated for "Best African Video" at the 2021 All Africa Music Awards.