Premise: Slam Creepers were a rock band from Vansbro, Sweden formed by Björn Skifs in 1962 and broke up in 1969. Björn Skifs then went on a solo career. They had some moderate hits including a cover of a Foundations song "We Are Happy People". Skifs would later find success with a number 1 hit "Hooked on a Feeling as a member of Blue Swede.
Hypothesis: Björn Skifs never had a solo career.