Steven "Stef" Bos (born 12 July 1961 in Veenendaal) is a Dutch singer who has been living in Cape Town, South Africa. He sings in Dutch (and occasionally in Afrikaans), and has been successful in Belgium, the Netherlands and South Africa ever since his breakthrough single "Papa" (Daddy) came out in 1990. Early in his career, Bos was also active as a TV actor, playing the character Joop Mengelmoes in the children's TV show Samson en Gert.

He wrote Belgium's entry into the 1989 Eurovision Song Contest, "Door De Wind".

Stef recorded an album (Together as One) in 1993 on which he worked together with Johannes Kerkorrel and Thandi Klaasen, two famous South African singers. From that moment on he fell in love with South Africa, the language Afrikaans and its music. We can hear the influence from Africa in his later albums like De onderstroom (The Undercurrent).