Cornelia Maria "Corry" Brokken was a Dutch singer, television presenter and jurist. In 1957, she won the second edition of the Eurovision Song Contest with the song "Net als toen", representing the Netherlands. Throughout her career, she scored a number of hits, sang in the popular Sleeswijk Revue with Snip en Snap, and had her own television show. She was also the presenter of the Eurovision Song Contest 1976, which was held in The Hague, Netherlands, following the victory of Teach-In the year before. She ended her career as a singer in 1973 to study law, after which she became a lawyer and ultimately a judge.

"Refrain" is a song recorded by Swiss singer Lys Assia with music composed by Géo Voumard and lyrics written by Émile Gardaz. It represented Switzerland in the inaugural edition of the Eurovision Song Contest and became the first ever winner of the contest.