Zen is a Dutch rock band, founded by Siegfried 'Siebe' de Jong (vocals and saxophone) and Dirk van der Ploeg (guitar and vocals) in 1965. Van der Ploeg writes the lyrics, music and arrangements. The hippie-oriented one hit wonder band hits the top spot on the Dutch Top 40 singles chart in January 1969, with their version of the theme from the musical Hair. Their only other single to enter the Dutch Top 40 was "Get Me Down", it peaked at #26 in 1969. After various line-up changes, the band dissolves in 1977. In the 1980s the first incarnation of the band plays some reunion concerts.
- "Muziek Centrum Nederland - Biografie - Zen" (in Dutch). Retrieved 13 March 2010.