EDM artist Avicii comes up with a fun way to build anticipation for his new album. As explained on the site for "True Revealed," he has put the artwork for the album behind a piece of black glass. Each tweet that comes in using the hashtag #truereveal will increase the volume at speakers that are aimed at the glass. When the music gets loud enough, the glass will shatter, showing the album art for "True." Check out a livestream here.