Not a one-hit wonder!

Everybody remembers The McCoys for their #1 hit "Hang On Sloopy in 1965. Their follow up "Fever" was a huge hit as well, climbing to #7 on the Hot 100 the same year.  And actually, the McCoys put nine songs on the Hot 100 over the next four years.  Definitely not one-hit wonders!  A great song, Fever has been mostly forgotten today.
listen here