Bette Davis and Joan Crawford – the feud that started it all. And by ‘it all’, we mean Ryan Murphy’s new show. Bette and Joan had an infamously rocky relationship while filming ‘Whatever Happened to Baby Jane?’ In fact, Joan Crawford trolled her co-star by sending her a rose every day just to be annoying. “Somebody is sending me one damn rose every day in a lousy little bud vase, and it’s driving me crazy,” Bette reportedly told producer William Frye. “If you’re going to send roses, for God’s sake, send a dozen, or more.” Iconic. Mary-Kate Olsen and Paris Hilton – somewhat hilariously, Mary-Kate Olsen and Paris Hilton had a brief celebrity feud in the roaring aughts, when Mary-Kate’s ex, Stavros Niarchos III, hopped into a relationship with the hotel heiress. Mary-Kate’s thoughts on the matter? “Always only had nice things to say about each other,” she told W. “Now I guess you can tell we’re not talking.” Courtney Love and Madonna – in what might be the best feud of all time, Courtney Love crashed Madonna’s 1995 VMA interview and threw a MAC compact at her head. Courtney ended up falling off her chair and Madonna vaguely implied that she was on drugs – you know, the usual. Jennifer Lopez and Mariah Carey – wow! She’s really going to keep this up, isn’t she? During an appearance on ‘Watch What Happens Live’, to which she arrived late, Carey maintained that she still doesn’t know who this J Lo person is, despite Andy Cohen’s pressing. “You know what? I’m very forgetful,” Carey said. “Apparently I’m forgetful, because I don’t remember the fact that it was just like, ‘Hi, I’m so-and-so,’ and then move on.” LOL. The literal sun is no match for the decade-spanning shade Mariah Carey insists on throwing at Jennifer Lopez. It all started when Mariah was asked about J Lo and mused “I don’t know her,” a classic moment that has since gone down in meme history. While Jennifer insists she and Mariah have met “many times,” the elusive chanteuse was recently asked about Jenny from the Block and said “I still don’t know her.” Queen. The ‘Charmed’ ones – if ‘Charmed’ has taught us anything, it’s that the power of three will set you free. Unless your name is Shannen Doherty, in which case you’ll peace out and get replaced by Rose McGowan. The ’90s star famously left Charmed after three years, and Alyssa Milano spilled some tea while on WWHL, saying, “Holly and Shannen were best friends for like 10 years before the show started, so it was very much sort of like high school. I would hope that in our 30s it wouldn’t be like that anymore.”