Make rock and roll light show history with Twisted Sister!

Twisted Sister wants you to join them to make rock and roll light show history on June 28th at Graspop Metal Meeting!

All you have to do is download the FREE CrowdMatrix app and you can use YOUR smartphone to be a part of the biggest light show in music history! Join us. Do it. Come to the party!

How to participate:



1. Download the FREE CrowdMatrix app to your iOS or Android device.
2. Allow push notifications when prompted. (iOS only - this is very important or the app will not function properly)
3. Click create account.
4. Enter desired email and password.
5. Once you've created an account, click the "+" button to add the show.
6. Click the Graspop show.
7. Click the Join button to join the show!

DONE. Now just sit back and wait for your cue to ROCK.