Claim: Gunvor Guggisberg co-wrote the song "Lass ihn" with Egon Egemann ( 1990 Eurovision Song Contest competitor) while working as a secretary and bar singer.
Evidence: Egemann returned to Eurovision in 1998, as composer of Switzerland's entry in Birmingham, "Lass ihn". She co-wrote the song "Lass ihn" ("Let him") with Egon Egemann and achieved an easy victory becoming a clear winner in the contest held in Zürich on December 18, 1997. Guggisberg was at the time working as a secretary at the Air Force's ministry as well as a part-time singer in a cocktail bar.