BOSTON, Aug. 5, 2015 /PRNewswire/ -- Billboard chart topping stars, Jack & Jack have become brand collaborators with Shuttersong, the free mobile app for connecting photos with sound, and are kicking off the partnership with a contest for a fan to win a chance to see them perform live in concert. Tomorrow, August 6, Jack Johnson and Jack Gilinsky, collectively known as Jack & Jack, will announce the contest to their nearly 20 million and growing combined followers across social media. Shuttersong is a digital community where you can create and share "Shuttersongs" - photos that have music, sound or voice embedded into them.read more