NEW YORK, NY – MARCH 30: (L-R) Usher, Rihanna, Nicki Minaj, Madonna, Deadmau5, Kanye West, JAY Z, and J. Cole onstage at the Tidal launch event #TIDALforALL at Skylight at Moynihan Station on March 30, 2015 in New York City. Jamie McCarthy/Getty Images for Roc Nation/AFP