By Radio.com Staff
Billie Joe Armstrong is a cool dad.
The Green Day frontman (along with bassist Mike Dirnt) joined his son Joseph’s band SWMRS for a charity gig at an Oakland record store on December 19th.
The show raised money for those effected by the warehouse fire at Ghost Ship where thirty-six people were killed.
Armstrong’s other son Jakob Danger Armstrong also performed.
Check out a clip of the family affair below.