"I Knew You Were Trouble" was one of Taylor Swift's biggest hits, but also seem to become her anthem as some of her relationships ended. Taylor Swift has been given the reputation of a serial dater with her list of A-List celebrity ex-boyfriends from Joe Jonas to Harry Styles. Her love life is always in the news as the media portrays her relationships as means for a new hit single. Recently, Taylor Swift has broken up with her boyfriend for over a year and moved on to a new man. The media is in a frenzy trying to catch Taylor Swift's new relationship up close.

As we watch her current relationship play out, we look back on some of the relationships in her past. Which were the best T-Swizzle boyfriends and the worst?

We rank all of them from worst to best below.

8. John Mayer

Taylor Swift was rumored to be dating the "Free Falling" singer, which was proved to be true after the release of Swift's song Dear John. The much older Mayer dated 19-year-old Taylor at that time causing waves in the music world. Mayer went on to date Katy Perry causing a rivalry between the two singers ever since.

7. Joe Jonas

6.Jake Gyllenhaal

The actor was the basis of some of her saddest songs on recent albums. "All Too Well" and "The Last Time" were both written about the actor after they broke up reportedly because of the age difference at the time. It was also cited that the publicity became too much for the famous actor.

5. Harry Styles

This One Directioner had his sights set on Taylor when their relationship first blossomed in 2013, but ultimately ended a few months later due to claims of infidelity. Harry Styles only had good things to say about Swift after the breakup even after the song "22" and "I Knew You Were Trouble" were linked to him.

4. Lucas Till

Lucas Till isn't as memorable as the others, but could be remembered for his roles in the Hannah Montana Movie and Swift's music video for "You Belong With Me", where Till played her love interest. The two had a short lived romance that ended because, simply, Till saw her more as a friend.

3. Conor Kennedy

Everyone was rooting for Taylor Swift's relationship with a member of the Kennedy family. She shocked everyone purchasing a home right next to the Kennedy's that summer, maybe freaking a few people out, Conor may have been one of those. The pair broke up shortly after and it is said because the relationship was too much for young Conor at the age of 18. Swift soon put the house back up for sale and got to writing a new album. You can hear a little bit about their romance in Swift's song "Begin Again".

2. Taylor Lautner

Taylor and Taylor first became an item while shooting Valentines Day, the movie that came out in February of 2010. The soon ended their romance just because it seemed that it wasn't going anywhere.The pair lived in different places and had different schedules, it just didn't seem to workout. Swift wrote "Back to December" about the "Twilight" actor about the mistakes she realized she had made.

1. Calvin Harris

The recent split between the singer and the very famous DJ is still under investigation. Reports have said that Swift may have cheated, while others say Calvin Harris just wasn't feeling it anymore.The whole world was shocked when their budding romance died in May. It meant no more perfect Instagram photos for us all to swoon over, We'll now have to wait until more details come out or Swift nails him in her next song. Whatever comes next.

Current Boyfriend: Tom Hiddleston

If you've been living under a rock or you simply don't follow celebrity news, Taylor Swift is on to a new man known for his famous roles in the movie, Thor. The actors romance with Swift was very sudden after her last breakup. Reports say that infidelity may have been a factor in her last relationship after the two were spotted together at the Met Gala. For now we just look on and see where these two love birds go from here. Looks like Rome it is!