If you haven't heard the news, Rihanna is on vacation. When she isn't smoking funny smelling looking things, she is sexing it up on her Twitter account (@rihanna). Over the last 48 hours Rihanna has unleashed numerous photos of herself in skimpy bikinis and putting her bad girl image on full display.

"Haaaa!!! Come tap this @KhloeKardashian," she wrote, while posting a picture of herself in a swimsuit on a treadmill. Another showed her taking a picture of her friend's booty with the hashtag "#CAKE."

[via Complex]

Is RiRi bored? Does she really have nothing better to do while on vacation in Hawaii? Below you will find 9 sexy reasons why we think Rihanna is bored out of her mind, but hey, I never said I was complaining.