Rayvanny, Harmonize, and Diamond Platnumz were once close friends who worked together with the goal of becoming musical giants. 

Rayvanny and Harmonize were proteges of Diamond in his music label Wasafi but broke away to forge their own paths.

Recently, the Next Level CEO shared a TBT of himself, Harmonize, Zari and Diamond Platnumz.

The humble beginnings and hard work appeared to make Rayvanny sentimental. He offered a major life lesson to young people in an encouraging note.

"Vijana Msikate tamaa ... Ipo Siku," he captioned the image above.

The four are bosses in their own right. The three men run music labels, while Zari is running colleges she inherited from her late husband Ivan.

Fans also noted their rise to stardom.

Some of the comments are below:

Lilian KE...Harmonize anakaa tu ananyanyaswa jameni 

Sarah Idirish Mustafa...Indeed life is a journey You guys came from far

Upcõmiñg Driłłër....Wow! Congratulations tunakaza zaidi

Wilfie Musiq...Sure ipo siku

Clay Boy TZ....Nakumbuka hii kauli nilipokuja kurecord wasafi wewe na harmonize mliniambia kaza hata sisi tumetokea uko uko hunaga malingo wala MAJIVUNO MUNGU AZIDI KUKUPIGISHA HATUA ZAIDI NA ZAIDI MZEEManeno yako bado yanaishi naamini ipo siku nitapata nafasi ya kuwa msanii mkubwa IPO SIKU haijalishi changamoto no nyingi kiasi gani Ila IPO SIKU

Xane Dha Dufla....Best transformation ni ya Harmonize,,

Lily Minja....Hapo Harmonize ndo alikua anatia huruma zaidi dah