Beyonce

Jay Z’s global streaming music service Tidal on Wednesday announced a super star charity concert in New York to celebrate reaching one million subscribers, six months after it launched.

Jay Z, his wife Beyonce, Prince, Usher, and Nicki Minaj will headline the Oct. 20 concert in Brooklyn, with tickets going on sale on Wednesday, firstly to Tidal subscribers. The concert will also be streamed live for both subscribers and non-subscribers via Tidal.com.

Tickets for the concert are priced between $74 and $244, and all proceeds will go to the non-profit group New World Foundation, which works with community organizations on issues including civil rights, social justice, poverty and education. Viewers watching online can also donate during the live stream.

Tidal launched in March offering only paid subscriptions, billing itself as the first of its kind music streaming service owned by artists, but it has struggled to compete against more established rivals Spotify, Pandora, both of which offer free streaming services supported by advertising, and Apple Music.

Rapper and entrepreneur Jay Z, who purchased Tidal from Swedish company Aspiro for $54 million earlier this year, said in April that the service, which is backed by top names like Madonna, Rihanna and Chris Martin, had more than 770,000 subscribers.