In the above video, Brian Stelter and "Entertainment Tonight" co-host Nancy O'Dell take a look at Joan Rivers's groundbreaking career.
Rivers was hospitalized on Thursday after she stopped breathing during throat surgery at a Manhattan medical clinic. She was listed in critical condition at New York's Mount Sinai Hospital.
"She had an impact, as far as being a woman in this business, because she really broke the glass ceiling," O'Dell said, referring to Rivers' appearances on "The Tonight Show" with Johnny Carson.
O'Dell also said that Rivers, age 81, has helped to disprove the "Hollywood myth" that "women can't have a long career" in the entertainment industry.