Rihanna Can Work, Work, Work A Shower Pole ...

Rihanna is a multitasker even on vacation ... rinsing the sand from her crack and chugging a brewski all at once!

RiRi cooled off in the Caribbean before the European leg of her tour kicks off next week. BFF Melissa Forde managed to snap these photos for the scrapbook and, we gotta say, did a pretty good job.