People are making the Milli Vanilli comparison (and yes, the headline "Yo-yo Mamilli Vanilli" is funny.) But the tape didn't skip (and did you remember it happened in Bristol, CT?)
But we went for years watching rock star heroes mime on American Bandstand, so what's the big deal. The trio was playing. The recording was them playing live earlier. And no one lost any money.
And it's better that they didn't play "Error Simple Gifts."