Tidal Live Stream Features Slew of A-List Artists, Including Madonna Straddling a Table

After a big countdown and star-studded teaser, Alicia Keys emceed an all-star livestreamed announcement about Tidal — the high-quality music streaming service Jay Z recently purchased — on Monday (March 30). “Our mission goes beyond commerce and technology,” Keys promised. “Our intent is to preserve music’s importance in our lives. It’s the world’s true universal language.” Jay Z’s Tidal…