Celebs that hid scary cancer diagnoses

Christina Applegate

Christina Applegate was working on the set of Samantha Who? when she was diagnosed with breast cancer. During an interview on The Ellen DeGeneres Show in 2008, the actress revealed that she worked for about five weeks right after undergoing surgery, but decided to keep the news to herself and few others.

"I told my make-up and hair people and people that are really close to me," Applegate told the titular host at the time (via Reuters), "just so I had a protection wall so that no one was pushing me." However, it wasn't until after she underwent her double mastectomy that Applegate went public with her diagnosis. She opened up about the decision to have the operation on The Oprah Winfrey Show: "It came on really fast. It was one of those things that I woke up and it felt so right … It just seemed like I don't want, next year, to have to deal with this again." Applegate added, "I was just going to let them go."