Jamie Foxx Life of Party on Italian Vacay, Grabs Mic to Lead Crowd in Song

Jamie Foxx really knows how to bring down the house, even when he's on a break from show biz ... because he got an Italian restaurant to join him in a rowdy singalong.

The Oscar and Grammy (that's key here) winner was enjoying a night out with friends in Capri when it quickly turned into a full-blown show ... and, he definitely had the crowd going!

Jamie was in great spirits, and he was sipping some too when he got on a microphone to remind the joint who he is ... in song, of course.

In his best R&B/operatic voice he sang, "I'm Jamie Motherf***ing Foxx!!!" -- and the band quickly joined in and pretty soon the whole place was belting out the simple, and hilarious, tune.

Of course, Jamie mixed in one of his radio hits too -- singing a little bit of his "Gold Digger" chorus -- but trust us, everyone left that restaurant singing one name. You will too after watching this.

This outing, combined with his South of France yachting with a mystery lady, makes it clear ... NO ONE is enjoying summer more than Jamie!!!