Let’s begin with arguably the most iconic Saturday Night Live moment to inspire a lifetime ban, as well as one of the series’ most memorable moments ever.
Lorne Michaels even let her say good night with the rest of the cast, and he was chastised accordingly.
Things were going as planned during her a capella cover of Bob Marley’s “War,” until she pulled the rug out from beneath everyone, using the moment to protest the Catholic Church for the child abuse allegations making headlines at the time, most notably by ripping up a picture of Pope John Paul II.
While Irish singer-songwriter Sinead O’Connor made it through her 1990 appearance without turmoil, her 1992 return was a bit more eventful.