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WEST HOLLYWOOD, CA - MARCH 27: Adam Shankman joins Mary McDonald as she entertains guests in celebration of her exclusive collection for Schumacher And Paterson, Flynn & Martin at Sunset Tower on March 27, 2013 in West Hollywood, California. (Photo by Donato Sardella/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.