Justin Timberlake gets sidetracked on video shoot by curvy Rihanna

Behind his dark glasses Justin Timberlake could be looking anywhere - but there's one shapely attraction he could be forgiven for eyeing.

Rihanna's curvacious behind, clad only in fishnet stockings, was undoubtedly the star of the show as the popstar duo filmed the video for their new single on the beach in Los Angeles yesterday.

She's giving sexy back: Justin Timberlake and Rhianna stand side-by-side as they film the video for their new music video in Los Angeles

Above the waist the Umbrella singer was the image of propriety, clothed in a multi-coloured wrap top and demure net hat. But her long legs were on display in all their glory as she stalked around the beach in cripplingly high platforms.

Justin was wrapped up somewhat warmer than Rihanna, in black jeans and a leather jacket.

There have been rumours that the two have dated in the past.

Strike a defensive pose: The two singers face off on the beach

Bend it like Rihanna: The singer shows off her fabulous figure in sky-high heels

But both are now in happy relationships, with Justin dating actress Jessica Biel, while Rihanna is with fellow RnB artist Chris Brown.

In fact rather than flirtatious relations between Rihanna and Justin looked decidedly frosty as the two stood face-to-face on the beach.

But instead of a fall-out it seems the two were acting out scenes from Rehab off Rihanna's Good Girl Gone Bad album.

After a quick costume change, Rihanna then stole the limelight again as she lay on a sunbed in suspenders and a pair of 40s style sunglasses.

Relax: The star stretches out on a sunbed, but where's Justin?

Flex that body: Rihanna strikes a sultry pose as she shoots the video