At just 22-years-old, country singer Taylor Swift has already earned herself a rather impressive list of hunky ex's. Blonde Taylor has previously dated Conor Kennedy, Chord Overstreet, Taylor Lautner, John Mayer, Jake Gyllenhaal, Joe Jonas and Cory Monteith. Most recently, Taylor dated One Direction heart throb Harry Styles, but their romance quickly came to an end earlier this year. 
Jen and John dated briefly
Taylor also has a reputation for writing a song about each of her ex's, resulting in smash hits such as We Are Never Ever Getting Back Together.
Joining Taylor on our list of celebrity serial daters is one of her ex's, musician John Mayer. Notorious womaniser John has reportedly dated a whole host of attractive ladies, including actress Jennifer Love-Hewitt, Minka Kelly, Jennifer Anniston, Jessica Simpson and, most recently, Wide Awake singer Katy Perry.
Leo dated Blake Lively, who is now married to Ryan Reynolds
Things seem to be going from strength to strength for John and Katy; the pair were recently seen getting cosy at the Grammy Awards Ceremony and John is reported to be head over heels in love with his lady. Aww!
Jennifer Aniston is also worth a mention on this list. The Friends actress has become a bit of a pro at dating since her divorce from Hollywood actor Brad Pitt - she has even dated fellow serial dater John Mayer! Also making an appearance is Jen's black book are Vince Vaughn, Paul Sculfor, Bradley Cooper and Gerard Butler.
Jennifer is now, of course, happily settled with the handsome Justin Theroux, who proposed to Jen on his 41st birthday after dating for more than a year. "Justin Theroux had an amazing birthday on Friday, receiving an extraordinary gift when his girlfriend, Jennifer Aniston, accepted his proposal of marriage," his rep told PEOPLE magazine.
Last up on our list of serial daters is actor Leonardo DiCaprio who appears to have a taste for tall, thin models, earning himself the reputation of a 'modeliser'. Leo previously dated supermodels Gisele Bundchen, Bar Rafaelli and actress Blake Lively, among many other none-famous leggy blondes.
Leo was however dating both Gisele and Bar for considerable period of time. Still, that's quite an impressive list of ex's for the hunk!
