The Most Memorable Grey's Anatomy Guest Stars

Sharon Lawrence
Episode: "No Good at Saying Sorry (One More Chance)"

Robbie Stevens (Lawrence) isn't the best mother to Izzie. She spends all her money on psychics, forcing Izzie to get a job as a lingerie model to pay for medical school. When she visits Izzie while she's undergoing treatment for cancer, Izzie and Bailey conspire to lie about Izzie's prognosis so that Robbie will leave Seattle.