Letting her hair down: Rihanna's friend shared some more intimate pictures of the singer during the sunny outing

She's been working and playing hard recently, taking her recording sessions and partying in between America and London. But Rihanna is now hard at work enjoying herself as she relaxes on a sunny break in Sardinia. The Umbrella hitmaker jetted in to the stylish region earlier this week and has spent the majority of her time aboard a yacht with her girl pals.

And now the singer has taken to her Twitter and Instagram pages to share her holiday photos - as well as her killer curves. Rihanna, 24, posed in her bikini as she flaunted her body while posing a number of positions on the luxury boat. She was joined by two girl pals, who also tweeted photographs of the singer in her summery finest.

In one image Rihanna can be seen smouldering at the camera with her lips covered in red lipstick. She pouts at the camera seductively while her hair blows in the wind and her tattoo can be seen. In another image she stretches across a boat next to one friend as they pose with the backdrop of a clear blue sky.

Poser: The Umbrella hitmaker struck a number of poses as she let her hair down in the sun with friends, before posting the pictures on Twitter

Holiday snaps: Rihanna poses with a friend while aboard a yacht in Sardinia as she shows off her bikini body

Setting sail: Rihanna is taking a relaxing break on a luxury yacht

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