3. Luciano Pavarotti
If the G.O.A.T. operatic tenor of his time lip-synched, then all bets are off. Indeed, the revelation that Luciano Pavarotti sung over his own recorded vocals at the Turin Winter Game Olympics in 2006 was startling. But according to the icon’s conductor, Leone Magiera, Pavarotti’s serious heath issues created an atmosphere that was “too dangerous for him…to risk a live performance before a global audience.” But longtime fans should not have been shocked by Magiera’s memoir revelation. Pavarotti pulled a similar move during a Modena, Italy concert in 1992.