\"I like to make people laugh,\" Pendergrass told \"Good Morning America.\"
Pendergrass has had surgery to remove a tumor in her breast and is currently undergoing chemotherapy. She will begin radiation this summer, she said.
When she started losing her hair from chemo, Pendergrass cut it short. A friend told her she resembled Maria from \"The Sound of Music\" and from there, she came up with a fun idea.
\"I decided at that point I was going to document my experience through pictures,\" she said.
Pendergrass has so far channeled Lucille Ball, Mrs. Doubtfire, Marilyn Monroe, Sleeping Beauty, G.I. Jane, Marge Simpson and lovable Christmas characters. Her favorite look is Charlie Chaplin, she said.
Family, friends and co-workers have also got in on the act, posing in group photos for Pendergrass' Instagram.
Pendergrass has a quote from a movie or actor that correlates with how she's feeling each week.
People from all over the country have let her know that her page has touched them.
\"It's nice that I could help others while helping myself,\" Pendergrass said.
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