"I think accidents happen. I think that's the nature of live television," Michaels can be heard telling "60 Minutes" journalist Lesley Stahl in the clip.

Following her SNL performance, Simpson explained that she had been suffering from an acid reflux flare-up which had caused her to lose her voice at the time. The singer, now 39, reflected on the incident earlier this year during a February appearance on the Broad Ideas with Rachel Bilson & Olivia Allen podcast.

A resurfaced unaired clip shows “Saturday Night Live” mastermind Lorne Michaels reacting to Ashlee Simpson’s infamous 2004 lip-sync disaster.