Formed in the Netherlands by twin brothers Chris and Gerard Koerts, and most popular in 1970, after adding a female singer, turning frontwoman, Jerney Kaagman.

After moving to pop, their biggest hit was "Weekend" (1979), a number one disco track in the Netherlands, Denmark, Germany, Portugal, and Switzerland.

While they played all over the provinces of North and South Holland, they rarely performed in their area as The Hague had its scene of beat bands.

[2] By the end of 1966, however, they had won a few talent shows near their hometown, had a fan club with over 250 members, and had drawn the attention of radio DJ Willem van Kooten.

[citation needed] Meanwhile, their music continued to evolve, with ideas for concept albums brought in from the US West Coast and improvisational practice sessions.

[5] By 1977, after four albums and nine hits, particularly songs such as "Memories" (which became their first number one single, and was named song of the year in Israel) and "Maybe Tomorrow, Maybe Tonight", the band found the Dutch musical atmosphere had changed considerably: new bands, influenced by disco, punk, and new wave, threatened to render many of the previously popular Dutch groups obsolete.

1977's Gate to Infinity suffered a cool reception and the album's lead single, "78th Avenue", failed to break into the Dutch top 10.