Comedic legend Joan Rivers died Thursday at the age of 81.

Rivers went into cardiac arrest on Aug. 28 following a procedure at a clinic. She had been moved out of intensive care yesterday into a private room.

Shepard Smith talked with Johnny Carson's former attorney and close friend Henry Bushkin, who recalled that he was "saddened" when Rivers' time with Carson ended.

"She became the permanent guest host of the "Tonight" show. That's how much he thought of her. Carson was a true legend, she was a true legend," said Bushkin, adding that Rivers was at the top of her comedy game even at age 81.

"She didn't age at all comedically. I understood that the night before she went to the hospital, she was working," he said.

Bushkin said he last saw Rivers in January and they "reminisced about the good times with Carson, not the bad times."

Watch the interview above.