Billie Eilish announced this morning that she has a special performance set for the Bay Area this Wednesday December 4th. You can't buy tickets for this performance, so you have to register for tickets today for a chance to be selected to attend.
Apple appears to be behind the event and you can register to attend here.
The show will be 16+ and guests will be selected at random. Those who are selected will receive an optional +1 for the event. You must register to attend by 11:30PM (PST) Monday December 2nd.
Billie also has a sold out Chase Center show set for April 7, 2020 in San Francisco.