"Green Day" vocalist Billie Joe Armstrong performed at the iHeartRadio Music Festival in Las Vegas.
He had somewhere around 30 minutes to perform on stage before it was taken over by Rihanna.
With only 4 minutes left, it wasn't even enough time to play "Basket Case".
At the 1 minute mark, Billie Joe loses his sanity on stage, mocked Justin Bieber, smashed his guitar to smithereens and gave the finger.
As of right now, Billie Joe is currently in rehab for substance abuse.
Here's a video of the performance in its entirety.