Taylor Swift has built a career based on songs about her breakups ... and this girl has had A LOT of breakups!  Sure she's young and beautiful and has plenty of time to settle down and find "the one," but she gives new meaning to the word serial-dater. Don't cry over Harry Styles, Taylor – you've got another hit song in your back pocket!

Check out all her exes and the songs they (allegedly, of course) have inspired:

• Joe Jonas: These two dated in 2008 for a couple of months and the song "Forever and Always" is supposed to be about their brief courtship.  "Last Kiss" and "Better than Revenge" are also rumored to be about Jonas.
   
• Lucas Till: Taylor briefly dated her co-star from her music video for "You Belong With Me." Things didn't work out because Lucas liked her more as a friend than a girlfriend. 
   
• Taylor Lautner: Aw, Taylor and Taylor! Their romance fizzled before the Valentine's Day movie they met on even hit the big screen, but Swift still managed to write "Back to December" about their split.
   
• John Mayer: This is what happens when a serial-dater hooks up with another serial-dater....disaster! They only dated for a month in 2010, but their relationship made headlines because of the "Dear John" song she allegedly wrote about it. Some also think  "I Knew You Were Trouble" is about John.
   
• Cory Monteith: Taylor bounced back with the Glee star, but things didn't last long ...
   
• Jake Gyllenhaal: Oh, boy – it's the older men that really break her heart. Apparently many of the songs on her new album Red are about Jake, but especially "All Too Well."
   
• Zac Efron: The two supposedly had a brief fling in 2011 ... but define "brief," because every single one of her relationships seems brief!
   
• Conor Kennedy: Stay tuned for a broken hearted summer romance song on her next album!
   
• Harry Styles: Wow – these two almost made it to three months!