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Green Day's Billie Joe Armstrong and his son Joey started their Father's Day celebration a little early this year. 

Restless Press says they took the stage together in Oakland this past Thursday for a surprise show under the name "Two and a Half Men."  With Joey on drums and Green Day touring member Jason White on bass, the elder Armstrong led the trio through an eleven-song setlist of Green Day deep cuts. 

Joey -- who plays in his own band Emily's Army -- posted a few pictures and videos of the family gig on Instagram.