VIDEO : Katy Perry Reacts to Julia Louis-Dreyfus Using Her Song During Cancer Battle

Julia Louis-Dreyfus has been very open about her diagnosis with breast cancer. who recently announced she is battling breast cancer. she has been updating fans through instagram about her battle. To announce the completion of her second round of chemo, she quoted lyrics from Katy Perry's famous song Roar/ Perry was ecstatic that her song was inspiring Louis- Dreyfus, and is quoted saying, ""I saw her post on Instagram and of course I double-tapped it? I'm glad she's using that song. I think she's a strong woman.?