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HOLLYWOOD, CA - APRIL 24: TV host Mario Lopez attends the premiere of Walt Disney Pictures' "Iron Man 3" at the El Capitan Theatre on April 24, 2013 in Hollywood, California. (Photo by David Livingston/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.