Harpo | The Making of 'Moviestar' (1975)
From the recording of Jan "Harpo" Svenssons hit "Moviestar" in EMI's studio in Johanneshov/Sweden 1975, led by Bengt Palmers. Especially note the backing singers at about 4 minutes into the video.
1975-10-14 19:00:00 - Music Video
Especially note the backing singers at about 4 minuttes into the video. The beautiful lady to the right is none other than Frida of ABBA.
Unfortunately my Swedish isn't good enough, so no translation into English :-(