Danish superstar Sanne Salomonsen recorded in 1992 ABBA's 'Knowing Me, Knowing You' - which was included on the Swedish 'ABBA - The Tribute' album of the same year.
Here's a performance of the song from a Danish TV show called 'Eleva2ren'.
If you look carefully, you can see Agnetha & Frida show up somewhere.
Sanne Salomonsen (born December 30, 1955) is a notable Danish singer. She has been performing since 1975, and various songs by her band The Sneakers were on the charts continuously from 1979 to 1985. She was also a member of the Anne Linnet Band.