Chanstoppen was a TV show where some of the artistes whose songs were currently tested for Svensktoppen performed their songs to playback. 

The show was hosted by Ulf Elfving who was the host of Svensktoppen at that time. The show was broadcast every other Sunday that autumn/winter in 1968.

Björn performed Fröken Fredriksson and Frida performed När du blir min.

Chanstoppen (Björn & Agnetha), 1968;
Chanstoppen (Björn & Frida), 1968;
Chanstoppen (Agnetha), 1968;

Thanks to Carl Magnus Palm.