Rihanna spent the weekend in Barbados dressed in a skimpy bikini while participating in the Kadooment Day Parade. According to the Barbados tourism department, Kadooment Day is

The grand finale to the Crop Over celebration, this public holiday is a summer street carnival where you can watch featured “Kadooment bands” dressed in costumes, designers competing for the Designer of the Year award, and revelers parade by on their way from National Stadium to Spring Garden Highway. You can also join locals and visitors alike in the “jump-up”, a joyous celebration and dance through the streets to calypso music. At Spring Garden, Barbadians continue with the festivities with more music, food, and drinks. Some decide to even take a dip at a nearby beach. Kadooment Day symbolizes and marks the end of the sugar cane harvest.

Basically, everyone gets drunk and watches girls in bikinis parade around in the street. The only difference between this and spring break is the outfits you perform simulated sex in are fancier and more jewel encrusted. That’s about it really.