It was in fact written by Russ Ballard, who was a member of the band Argent.
Paul, Gene and Bob Ezrin re-arranged the song before recording it for the Bill & Ted's Bogus Journey soundtrack in 1991. Eric Carr sang backup vocals on it and appeared in the video (his last performance) but Eric Singer played drums.
Oh, and the original song blows goats compared with the KISS version, but anyone with half an ear can tell that...
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