4 ABBA
  Boney M
3 George Baker selection
  the Middle of the road
  Mud
  Queen
  the Sweet
  Vader Abraham
2 10cc
  Baccara
  the Cats
  Creedence clearwater revival
  Alexander Curly
  Earth & fire
  the Golden earring
  Julio Iglesias
  Vicky Leandros
  Luv'
  Rod McKuen
  Mouth & MacNeal
  Olivia Newton-John
  Gilbert O'Sullivan
  the Osmonds
  Pussycat
  the Rolling stones
  Demis Roussos
  Shocking blue
  Smokie
  Village people