He was early active internationally and then became really popular in Sweden with his successes as a solo artist in the mid-1980s and with Grymlings in the early 1990s.

In early 1972 (or possibly late 1971) Rickfors became a member of the popular British rock group The Hollies where he had to replace singer Allan Clarke, who had left the band to pursue a solo career. Rickfors left the group in July 1973.