>>> new pop star cat fight. taylor swift versus katy perry. >> taylor publicly takes a shot and katy bites back. now on "extra." >>> taylor swift's new song about her enemy. is she talking about katy perry? what sparked the feud, and how katy just threw gasoline on the fire. >>> melissa rivers getting some retail therapy after joan's funeral. >>> plus, howard stern's wife beth today on the tense moments before howard's unforgettable tribute. >> he really wanted to make joan proud. >>> the first pics of ray rice and his wife as she speaks out about the shocking beatdown. >> why she's defending him and who she's blaming for ruining their lives. >>> all new britney. super sexy project. >> you're going to be sleeping with a lot of people. >> i don't know about that. >>> then, jen aniston in a