Since Tidal launched, we've seen them offer exclusive new tracks from Rihanna and Beyoncé and an exclusive music video from Jay Z, but this is definitely the best excuse to subscribe yet. Hova just announced a "B-Sides concert" in NYC that'll take place on May 13th, and to attend, you have to be a Tidal subscriber. 

The rules, which basically consist of subscribing, following Tidal on Twitter and submitting a playlist of your choosing, are viewable in the gallery above. Check out Jay's announcement tweet below, and enter the contest here. Let's hope Jay isn't really planning on going back to spelling his name with an umlaut.