Pre-ABBA Frida from 1967, with English subcaptions added.
The following was taken from Wikipedia:
"In the summer of 1967, Lyngstad won a national talent competition with the song "En Ledig Dag" ("A Free Day" or "A Day Off"). Unbeknownst to Frida, the winner of the contest was also expected to appear the same evening in one of the country's most popular TV shows at that time, Hylands Hörna (Hyland's Corner; Lennart Hyland being the host of the show). This programme was broadcast for two hours, on the very same day that Sweden changed from driving on the left-hand side of the road to the right. For this occasion the show was re-named Hylands Högerhörna (Hyland's Right Corner)."