The doctor is in! Kristen Stewart poses with Peanuts character Lucy for breast cancer benefit at Knott’s Berry Farm The #ScreamAgainstBreastCancer benefit at the Los Angeles theme park Knott’s Berry Farm got a celebrity drop-in when it was held Saturday night. Kristen Stewart cut a casual chic look as she posed with a staff member dressed as Charles Schulz’ Peanuts character Lucy Van Pelt.