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Alyssa Milano

LOS ANGELES, CA - APRIL 23: Alyssa Milano attends Project Angel Food And CAA Celebrate ANGEL ART, A Contemporary Art Auction Benefiting Project Angel Food at CAA on April 23, 2013 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.