Rihanna, Beyoncé & more show up for Jay Z’s ‘Tidal’ announcement...

A major event in New York's Herald Square saw some of music's biggest heavyweights signing on to support Jay Z’s brand new streaming service, Tidal. Everyone from Beyoncé, Alicia Keys and Rihanna to Usher, Nicki Minaj and Madonna.

In a bid to out-rival Spotify, Jay Z certainly pulled out the stops for this one. More PR fodder and fat checks for this lot. Who's on board for it anyway? Because in all honesty, I can truly say I could care less.

Thoughts?