Rihanna bares her pert derriere in tiny bikini

Rihanna posted another round of bikini snaps from Hawaii on her Instagram page Saturday showing off her fabulous body.

The 27-year-old captioned the shots with '#davis420wedding,' a reference to the marriage scheduled for Monday of her longtime assistant Jennifer Rosales to Aaron Davis.

Rihanna shared a photo of herself in a sultry pose as she cooled off in a swimming pool while clad in a skimpy bikini during her vacation in Hawaii on Saturday.

In the photos, Rihanna rocks a teeny weeny patterned bikini and poses in the pool, lying on a sun lounger and taking photos on her phone.