When Joan Rivers passed away at the age of 81 on Thursday, Twitter and Facebook were immediately flooded with kind words and remembrances from not only fans but also Joan's friends and fellow comedians. Joan was nothing short of an entertainment pioneer, carving a space of her own in the male-dominated field of comedy of the '60s and '70s and later launching The Late Show. She also completely re-created the red carpet experience at award shows thanks to her hilarious coverage alongside her daughter, Melissa Rivers. See how stars are remembering the iconic comedian below.