"Billie apologised to me from the bottom of his heart. It was just two old friends on a park bench. I hope to be on a park bench with him when I'm old, feeding f**king birds and having conversations." Green Day star Mike Dirnt on his chance meeting with bandmate Billie Joe Armstrong in a coffee shop just days after he left rehab for alcoholism and prescription pill abuse. Dirnt and bandmate Tre Cool were forced to announce the cancellation of a string of Green Day dates after their frontman checked in for treatment last year (12).