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Kristen Bell

LOS ANGELES, CA - OCTOBER 29: Kristen Bell attends Wantful: Art of Giving Los Angeles at The Eveleigh on October 29, 2012 in Los Angeles, California. (Photo by Stefanie Keenan/WireImage)

Stars Applaud Angelina Jolie on Twitter

Angelina Jolie's New York Times op-ed about her choice to undergo a double mastectomy to greatly decrease her high risk of breast cancer  has sparked lots of celeb reactions on Twitter, including some from stars who've dealt with breast cancer themselves. Check out what they're saying and join the conversation on Twitter.