Rihanna String Bikini Pictures

Rihanna was in a string bikini yesterday for an afternoon of surfing in Hawaii. She wasn't photographed actually paddling, but seemed content to soak up the sun while laying out on the board. We've seen lots of Rihanna bikini pictures during her latest tropical getaway. She's been all about wearing bathing suits, whether horsing around with her friends or even working out on an elliptical. Rihanna certainly earned the downtime after touring the world in the last year and releasing a new album. She'll be back to work soon, though, when she does a duet with Coldplay at the Grammys on Feb. 12.