In 2012, Star magazine accused Swift of two-timing boyfriend Conor Kennedy with his cousin Patrick Schwarzenneger -- even getting caught making out with him at a family event! Swift's rep denied the claims.
In 2013, Swift was spotted getting flirty with Aussie actor Brenton Thwaites -- prompting his longtime love, model Jessica Campion, to air her angst on her Tumblr. "Worst. day. ever," she posted, before reposting a note from a fan that read "her music is sh*t anyway … and you're prettier." Swift and Thwaites relationship failed to ignite.
Swift's latest paramour, British actor Douglas Booth, reportedly put the brakes on their relationship early this year after she showed too much interest, too fast. He "just wants to be friends," said a source.
Swift reportedly snubbed one-time boyfriend Harry Styles at the American Music Awards in November, refusing to stop and chat or make eye contact.
Just a few months earlier at the VMAs, she was caught apparently saying "Shut the f*ck up," when he spoke onstage, but her pal Ed Sheeran later insisted the comment was not directed at Styles.
John Mayer has said he was "humiliated" by Swift's song "Dear John," which was widely assumed to be about him. "I didn't deserve it," he said.
Mayer got his own revenge not long after by writing his own kiss-off song reportedly about Swift, "Paper Doll."
Swift seems aware that maybe, she's the common factor in all of her relationship dramas. “I think it needs to change,” she said in October about her dating M.O.. “My friends tease me about the fact that if someone seems bad or shady, or like they have a secret, I find them incredibly interesting."
In an interview with Marie Claire magazine, Swift revealed that she keeps a "Sh*t List" filled with "Exes," but she knows how to get back at them: "Every one of my regrets has produced a song I'm proud of.
Swift was reportedly "really bitter" about encountering her ex, Mayer, at the 2013 Academy of Country Music Awards. "John just being there irked her," a source said at the time.
Last March, Radar reported that One Direction star Styles was telling friends he regretted ever hooking up with Swift. Said a source, "He now wishes he never dated her. … What for Harry was 'a bit of fun' at the time has turned in to a personal nightmare …"
Swift reportedly made a jab at Styles in the video for her song "22," when she wore his signature olive green beanie to sing the line "It feels like a perfect night to dress up like hipsters and make fun of our exes."
In March 2013, comedian Chelsea Handler slammed Swift's carousel of high-profile relationships. "My theory about Taylor Swift is that she's a virgin," Handler told Andy Cohen. "That everyone breaks up with her because they date her for two weeks and she's like, 'I'm not gonna do it.' And they're like, 'Oh, well forget it. Then I don't want to date you.'"
A friend of Swift's told Vanity Fair in 2013 that she and Styles split because he cheated on her in Australia, as Radar had previously reported.
Swift insisted that she never made the stalker-ish move of buying a home across from then-boyfriend Conor Kennedy's family home in Hyannisport, Mass. But Vanity Fair reported that "It was like a house flip … a good short-term investment," and that an LLC registered to a member of her management team did indeed buy the property."
Swift and pal Ed Sheeran reportedly spent the night together at a London hotel on February 19, 2013, but the two continue to insist that they've always been just friends.
In February 2013, Swift told Elle that she "never chases boys" and slams her exes in her songs "to feel better."
Swift allegedly mocked ex Styles at the 2013 Grammys when she began speaking in an over-the-top British accent and said, "So he calls me up and he's like 'Ah still love you' … and I'm like, 'I'm sorry, I'm busy opening up the Grammys … and we are never getting back together!"
In January of last year, Radar reported that Swift had begged pal Jennifer Lawrence to set her up with Bradley Cooper, but he dismissed her as too young. In addition, a source said at the time, "…her reputation precedes her." In fact, his new girlfriend Suki Waterhouse is two years younger than Swift.
After Swift split from Styles, Jack Osbourne's wife Lisa slammed her on Twitter. "I usually find out when Taylor Swift breaks up with someone before I even knew they were dating. That's how fast these things happen. Either Taylor Swift is bat s**t crazy & causes every guy to dump her, or she has too high standards for these poor guys droppin' like flies!"
In December, 2012, Swift was reportedly searching for a U.K. home near new boyfriend Styles. But they broke up before she could find one.
Swift has admitted that one ex begged her not to write a song about him, but she did it anyways. "Of course I was like 'Oh, don't worry, I won't,'" she told the New York Times Magazine in 2012. "And then I did. …If we break up, I'm going to write about it."
She's also admitted that she "feels so bad" about her plethora of exes. "It just makes me really question like what I stand for as a human being," she told Ellen DeGeneres. "There's never been two guys on the screen two visits in a row. It's sad."
Does young love trump good manners? In 2012, Kathie Lee Gifford confirmed reports that Swift crashed a Kennedy family wedding so she could attend with then-boyfriend Conor.
In February 2012, Swift was spotted on a few dates with football stud Tim Tebow, but that relationship never went anywhere.
In 2012, Swift hinted that she'd suffered "earth shattering … absolute crash-and-burn heartache" after being splitting from Jake Gyllenhaal. Several songs on her "Red" album are rumored to be about their breakup, including "We Are Never Getting Back Together."
Swift's song "Back to December" is rumored to be an apology to ex-boyfriend Taylor Lautner, who she split with in 2009.
Swift accused Joe Jonas of breaking up with her in a 27-second phone call back in 2008, a claim which he later denied.
Swift admitted to writing the song "Forever and Always" about Jonas, who she called an "ouch" of a boyfriend. It includes the line, "Did I say something way too honest that made you run and hide like a scared little boy?"