Today, Jay Z threw a launch event in New York City to celebrate the re-launch of Tidal, the streaming service he recently purchased. Win and Regine from Arcade Fire, Kanye, Beyoncé, Daft Punk, Jack White, Nicki Minaj, Madonna, Rihanna, Usher, Alicia Keys, J. Cole, and many more artists were all on hand for the launch. It was announced that they are all co-owners of the service. After a speech from Alicia Keys, they all signed a declaration.

Video after the jump …