Could I borrow your phone, please? http://al4a.fun/al4avideos/ al4a Well, she's a rock star all right! Rihanna flaunted her bikini bod on Instagram in an itty bitty yellow two-piece with a guitar design on July 9, 2013. The singer, who squinted into the sun as she showed off her collection of body ink, captioned the sexy photo, "Oh baby I'm a Roc StaR."