Rascal Flatts wants to put the fans in the director's chair. The trio has created a Facebook application that allows anyone to create their own music video "mashup" of "I Won't Let Go." Users are encouraged to upload up to three videos and four photos into the generator to create a custom music video that they can share with their friends via Facebook or URL. Fans can also download a "toolkit" that includes video snippets, photos, and other assets to create a more custom music video with their own software. By creating a video online or uploading a video into the mashup gallery, you are entered to win a trip to the set of the next Rascal Flatts music video shoot.  Super cool!