Calling all Guinness World Records Unleashed® fans, we are attempting the world record for most Guinness World Records Unleashed T-shirts given away in one contest. Okay we aren't really attempting that, but we are giving away 15 free T-shirts. Enter now for a chance to win a shirt and tell your friends how you "attempted" to break a world record. All you have to do is click the "Enter Now" button located right below this text. Then fill out the entry form completely, tell us what size you'd prefer in the "Additional Message" section, and hit the SEND button. Contest ends 12/20/2013 at 11:59 ET, so enter before then, or you're out of luck! We'll pick 15 winners at random.