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Sheryl Crow

WASHINGTON, DC - MAY 08: Sheryl Crow poses for a photo during the 2013 Global Down Syndrome Foundation Fashion Show and Gala at Ritz-Carlton Hotel on May 8, 2013 in Washington, DC. (Photo by Kris Connor/Getty Images)

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.