Believe It or Not is a song composed by Mike Post with lyrics by Stephen Geyer, and sung by American singer Joey Scarbury. It serves as the theme song for the 1980s television series The Greatest American Hero. The track was later included on Scarbury's 1981 debut album America's Greatest Hero.\n\nBased on this passage, who sang believe it or not it just me? Let's give stream of consciousness first:
User
The relevant sentence in the passage is: "Believe It or Not" is a song composed by Mike Post with lyrics by Stephen Geyer, and sung by American singer Joey Scarbury.
So, the final answer is American singer Joey Scarbury.
Assistant