Vivien Killilea/WireImage Sarah Michelle Gellar thinks longtime pal Shannen Doherty is a real-life superhero. “She’s incredible,” Gellar, 46, told Access Hollywood in a Tuesday, October 24, interview about Doherty, 52, who has been battling stage IV cancer. “When they say a warrior, she is a warrior. She lives every day and she’s fighting. There are […]