Adding another chapter to their bitter, post-divorce feuds, Charlie Sheen apologized for calling ex-wife Denise Richards a "f--king c--t" and a "f--king n----r" on a three-year-old cell phone message Richards recently made public according to Us Magazine. Sheen released a statement yesterday saying, "I deeply apologize by my choice of words to all I have obviously offended; especially to Tony Todd, an African-American, who was my best man at my first two weddings."