Wake up, babe. Mark Zuckerberg is surfing while wearing a tux and waving the American flag.

Elon Musk razzed Mark Zuckerberg on Thursday after his fellow tech billionaire wished America a "Happy Birthday" with a ...

But either way, these stars all had a blast on the Fourth of July — read on to see how ... Mark Zuckerberg wished the nation a "happy birthday" as he had his hands full catching waves.