In just four days Green Day will be performing at the Red Bull Sound Space on KROQ, I believe it's in Los Angeles. You can enter to win tickets to the event, which will also include a fan Q&A session.
They're giving away 100 tickets, so if you're at least 18, from southern California, AND can be there on Monday, sign up! The deadline is today at 2pm PST!
The performance will be streamed online for us mere peasants over on the KROQ site on Monday, starting at 3pm PST, 6pm EST.
Related forum topic.