Rihanna Follows Up Dinner with a Scenic Capri Cruise

And it sounds like Rihanna (24) has been keeping some seriously crazy hours as of late, causing the staff on her boat to grow weary.

An insider told press, ''The gang stayed up singing and dancing until dawn. She's a lovely girl but the crew are only getting a few hours sleep a night. And they have to be prepared to be vigilant and make sure she doesn't get hammered and fall into the sea.''