Patrick Schwarzenegger showed off his pecs in a star print tank top on Thursday, and the Governator's son and a handful of male pals were snapped heading to a bash in Malibu.

"Happy 4th July to you all. Thanks to everyone who made this historic day possible," Patrick tweeted early in the day. Around midnight he added, "I did not just take shots with @dlee042 and try to convince him to come to lakers.... Only in LA."

He's talking about Golden State Warriors star David Lee, and while we don't have a problem with that, what's 19-year-old Patrick doing taking shots ... and tweeting about it?! (We're assuming the kinds of shots he's referring to are not the ones taken on a basketball court...)