Claim: Gunvor Guggisberg plagiarized the song "Lass ihn" and never sung again (she previously worked as a cocktail bar singer) when she wasn't credited with her work.
Evidence: 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. 
On May 9, 1998 Guggisberg performed "Lass ihn" in Birmingham, England at the final of the Eurovision Song Contest. However, despite being one of the favorites to win, she failed to score a single point, finishing last in the contest. Determined to continue, she released a follow-up single but it failed to reach the Swiss charts. 
"Lass ihn" (1998) (Single) "Money Makes…" (1998) (Single) "Land of Fantasy" (1999) (Single) From A to Z (2000) (Album) "Born to Be (Loved by You)" (2002) (Single)