Founded in Shanghai three years ago, musical.ly exploded among U.S. tweens, attracting mainstream entertainers and spawning a roster of stars that have pulled in millions of followers. The app has more than 100 million “musers,” — or Musical.ly users in company lingo — around the world. People can filter, edit and broadcast short video clips using songs they choose. The startup has rolled out other products including live streaming app Live.ly, group video chat Squad, and video messaging app Pingpong. – Sarah Frier/Selina Wang & Gerry Smith, Bloomberg Technology http://ift.tt/2qzmZGO