"She is doing amazing and can fight any challenge life throws at her," rumored Dancing With the Stars contestant Lance Bass tells Us.

Christina's Samantha Who? co-star Barry Watson adds, "I know Christina really well, and I know she will get through this with a positive attitude and a great sense of humor."

Watson himself was diagnosed with Hodgkins lymphoma at the age of 28. He underwent a year of treatment before going into remission.

Luckily Applegate, whose mother is a cancer survivor, caught the disease in an early stage.

You'll kick Big C to the curb, too, Christina!