Supersister was a Dutch band from The Hague, Netherlands, active 1970-1974, 2000-2001 and 2010-2011. They played Progressive rock ranging from jazz to pop and although Dutch, they are generally considered to be part of the Canterbury scene due to their playfulness and complicated sound. The most predominant band members were Robert Jan Stips (keyboards, vocals), Sacha van Geest (flute), Marco Vrolijk (drums) and Ron van Eck (bass).
The band started in 1967 as Sweet OK Sister as a school band with singer and songwriter Rob Douw, who soon thereafter left. The remaining members continued as a more serious musical quartet under the name Supersister. Their style was progressive rock in which Stips' keyboard played a dominant role.
Their debut was the 1970 album, Present from Nancy, with charting singles such as "She Was Naked", "A Girl Named You", and "Radio". After the three albums Present from Nancy (1970), To the Highest Bidder (1971), and Pudding en Gisteren (1972), Van Geest and Vrolijk quit. The remaining crew, together with new members Charlie Mariano (wind instruments) and Herman van Boeyen (drums) released the album Iskander in 1973, which is a jazz-rock oriented concept album based upon the life of Alexander the Great.
In 1974, Stips and van Geest released a final album, Sweet Okay Supersister, which marked the end of the band.
The band reunited in 2000, after a request by the Progfest festival for a performance in Los Angeles. The four 1970-1973 period band members decided to accept and the result was the requested performance, as well as a short tour through the Netherlands in late 2000 and early 2001. To mark the occasion a rarities album was released, called M.A.N. featuring live and studio recordings from 1969-1973. The reunion abruptly came to an end when van Geest unexpectedly died of heart failure in the summer of 2001. The reunion concert at the Paradiso in Amsterdam was recorded and later released on CD (Supersisterious, 2001) and DVD (Sweet OK Supersister, 2006), which also featured several old and new documentaries, photographs and unreleased audio tracks.
The band reunited once more, as a three piece, in 2010 for two songs in a televised celebration concert for 50 years of Dutch pop music. After this the band was scheduled to play at Nearfest 2011. Rehearsals were started, but the appearance at the festival had to be cancelled when Ron van Eck became seriously ill (he was already battling leukemia for a while) and eventually died in July 2011.
The complete discography is available from the entry in the Dutch Supersister Wikipedia page.