Madonna, Beyonce, Rihanna, Nicki Minaj and more join TIDAL

Madonna, Beyonce, Rihanna, Nicki Minaj and other popstars joined Jay Z last night to launch new music streaming service TIDAL.

In a bizarre launch event, stars including Alicia Keys, Kayne West, Daft Punk and Jack White came together to sign a declaration for the new music streaming site.

Watch a video of the stars lining up for the event below.