The distance between fanboys and their favorite female celebrities is nearly non-existent thanks to social media. They can follow their thoughts on Twitter, like them on Facebook, and get a glimpse into their lives on InstagramTumblr is another way of keeping tabs on a celeb's interests, and although it's a little less popular with the starlets, there are still a lot of famous hotties on the site. We took up the task of tracking them down. Here are The 25 Hottest Celebrities On Tumblr. Get ready to do a lot of reblogging.