Swedish singer who has been popular in Scandinavia and West Germany She had a number one hit in West Germany in 1964 with Liebeskummer lohnt sich nicht English Lovesickness Is Not Worthwhile and on 18 July 1964 she became the first Swede to have a hit on the US Billboard Hot 100 chart when Sole Sole Sole a duet with Italian singer Umberto Marcato entered the chart peaking at 58