In April 2000, Mhlanga produced Vusi Mahlasela's fourth album and appeared on it. In 1999, a live duo recording with Mahlasela resulted in the album "Vusi and Louis Live at the Bassline". He was involved with Thandi Klaasen's album "Two of a Kind", which was initiated by Dutch singer Stef Bos. Bos featured Louis on the album "De Onderstroom", for which he co-wrote the music of the title song. Mhlanga is on the album "Place of Hope", which contains collaborations with George Duke, James Ingram, Al Jarreau, and Dianne Reeves. He is also on "Fire in the Engine Room" by Andy Narell. Following their South African tour, they released the album "Live in S.A."