Actually I've just realised that I have.
Years ago, when I was only about 14, I heard a song on a tape that my elder brother had recorded from the Friday Rock Show that I absolutely loved. He told me it was Todd Rundgren so I proceeded to buy all the Rundgren & Utopia stuff I could get my hands on over the next few years in the hope of finding the song. As a result of this I became a rabid Todd Rundgren/Utopia fan but never found the song I was looking for.
Years later I discovered that the song wasn't Rundgren at all, it was actually a track called "I'm Out to Get You" by Robin Trower from his "Caravan to Midnight" album.
I hardly, if ever, listen to Rundgren or Utopia anymore, but I was completely obsessed with him/them for decades & this was brought about purely because my brother was a useless dick that couldn't even write the name of a song down properly.