Justin Bieber was just another dude in the park Saturday afternoon in SF, yucking it up over a game of duck duck goose.
Bieber, Hailey Baldwin and some pals hit up Fort Mason Park ... listening to music, smoking, drinking and just having a good time.
Biebs and Hailey partied later that night, first at the Maxim Super Bowl bash when he took the stage during A$AP Rocky's performance. Later, they went to the Battery Super Bowl party.
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