Here's the email I received from LiveNation:
Thank you for contacting Live Nation Customer Care with your inquiry!
We have just been informed that this event is no longer happening. I apologize for any inconvenience. Please keep checking http://www.livenation.com for updates.
Please respond to this e-mail if we can be of further assistance regarding this or any other inquiry.
Sincerely,
Tara
Live Nation Customer Care