Happy Valentine's Day! Today and throughout the week, we'll be sharing with you all of our favorite people during our annual "Geeks We Love" series. I'm sure you spend as much time on YouTube as I do (probably more?), so it's only appropriate that we spread the love by telling you about five of our favorite YouTube stars. All of them are great in their own way, but one common trait they all share? They're hilarious. Get ready to up your YouTube subscriptions after you check them out in this slideshow!