Melissa Rivers will make her first public appearance since the tragic death of her mother Joan Rivers on Fashion Police Friday in a pre-taped Celebrating Joan special.

Melissa Rivers Remembers Mom On 'Fashion Police'

Melissa was accompanied on the Fashion Police set alongside her late mother’s former co-hosts Kelly Osbourne, Giuliana Rancic and George Kotsiopoulos. In addition to the group sharing fond memories of Joan, Melissa also shared all of the heartfelt condolences she’s received since her mother’s passing – including one from the White House.

"She affected so many people, and people you would never expect to have humor," Melissa said. "I received a letter from the White House, President Obama, someone who was often a target of her jokes, as was Mrs. Obama, but I received a hand-written note saying 'Not only did she make us laugh, she made us think.'"

Osbourne, who has said that Joan was like a grandmother to her, agreed that she had made people think and that she also paved the way for independent-thinking women.

“She really did [make us think] and if it wasn’t for your mother, I wouldn’t be able to be me,” said Osbourne. “My mother wouldn’t be able to be her. Any outspoken, independent woman wouldn’t be who they are if it wasn’t for women like Joan paving the way.”

Fashion Police: Celebrating Joan will air on E! Friday at 8/7c, following an all day (7am-7pm EST) Fashion Police marathon.