I remember seeing Jethro Tull in concert several years ago. My wife mistakenly told me that it was a tribute band to Jethro Tull. My friend who had tickets and invited me to the concert never specified whether it was a tribute band or not, so until the end of the concert, I was under the impression that I was watching a tribute band, even though I thought the singer looked and sounded a lot like Ian Anderson and he even played the flute while balancing on one leg at times. Not sure where my wife got the idea it was a tribute band.
Finally, at the end of the concert, they announced the singer as "Ian Anderson," so I then knew it was not a tribute band, but the real deal!