There are multiple artists that perform under the name Jay Kay: 1.) Josef Maria Klumb, also known under the pseudonym Jay Kay, is a German musician. He became known through music projects such as Forthcoming Fire, Weissglut or Von Thronstahl. 2.) Jason Kay, also known under his stage name Jay Kay is the lead vocalist and co-founder of English funk band Jamiroquai. Jamiroquai is often misattributed as a solo project by Kay.