Improbably, Tidal has reached a subscriber base of 1 million, according to a rare tweet that Jay Z sent out earlier today. Granted, that number seems to include the near 600,000 that were already members of Aspiro when that company was absorbed by Jay Z and turned into his fledgling streaming service, and it pales in comparison to the paid subscriber base of Spotify (around 20 million) and even Apple Music (around 11 million, all of whom are still in trial until the end of the month). So … good job, I guess?

Jay Z will be celebrating the milestone with an event on 10/20 in Brooklyn.

"Nothing real can be threatened, nothing unreal exists" Tidal is platinum. 1,000,000 people and counting. Let's celebrate 10/20 Brooklyn.

— Mr. Carter (@S_C_) September 29, 2015

The concert will feature Jay Z, Beyoncé, Prince, Usher, Nicki Minaj, Lil Wayne, T.I., and Jimmy Kimmel (who will be in town all that week with his own show). It’s being called “the 1st in a series of philanthropic music events curated by TIDAL,” and is being sponsored by HTC. It’s, of course, being held at Barclays Center and will be livestreamed via Tidal and HTC.com. Here’s the full lineup:

(3/16) An all-star lineup including JAY Z, Prince, Usher, Nicki Minaj, Lil Wayne, T.I., Jimmy Kimmel, Beyoncé. #TIDALX1020 @HTC

— TIDAL (@TIDALHiFi) September 30, 2015

(4/16) Damian Marley, Indochine, Thomas Rhett, Fabolous, DJ Cipha Sounds, DJ Reflex and many more. #TIDALX1020 @HTC

— TIDAL (@TIDALHiFi) September 30, 2015

(5/16) TIDAL Rising acts Alessia Cara, Bas, Benjamin Booker & Justine Skye. #TIDALX1020 @HTC

— TIDAL (@TIDALHiFi) September 30, 2015

Tickets will be available for Tidal members today (9/30) at 12PM EST, and to the general public on Friday (10/2) at noon EST, as well. Details here.

Read our essay about Tidal from back in March.

UPDATE 9/29: A Tidal representative says that the service inherited a 400,000 subscriber base from Aspiro, though reports from around the time it was acquired state a number closer to the 600,000 cited above.