Reuters: Jay Z’s global streaming music service Tidal has announced a super star charity concert in New York to celebrate reaching 1 million subscribers, six months after it launched. Jay Z, his wife Beyonce, Prince, Usher, and Nicki Minaj will headline the Oct. 20 concert in Brooklyn, with tickets going on sale first to Tidal subscribers. The concert will also be streamed live for both subscribers and non-subscribers via Tidal.com.