Ms. Lindfors's performance of "Nygammal vals (Hip Man Svinaherde)" ("New-Old Waltz (Hip Pig Breeder)") with Svante Thuresson took second place in the 1966 Eurovision Song Contest.
She was a presenter at the 1985 Eurovision Song Contest in Gothenburg, Sweden, and was most famous for suffering a wardrobe malfunction live, during the contest, after passing through a part of the elaborate set. She later admitted it was a gag, not practised during rehearsals beforehand. According to author John Kennedy O'Connor's book The Eurovision Song Contest - The Official History, the EBU were not pleased with this stunt and the wife of scrutineer Frank Naef, was particularly shocked by the incident. It remains one of the most iconic moments in the contest's history. She also performed "Musik skall byggas utav glädje" ("My Joy Is Building Bricks of Music") as the contest's major opener.
She has starred in several swedish TV-shows which has been awarded in Montreaux.
In 1998, she became Sweden's Goodwill Ambassador to UNICEF.
Ms. Lindfors released a new single in 2006, "Ditt Vackra Leende".