She recently set pulses racing when she shared a scantily-clad snap of herself ahead of Barbados’ annual Crop Over Festival, with some even calling the shot ‘iconic’.

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But many of her fans were baffled by the image, after spotting that the music icon appears to bizarrely have two thumb nails in the sizzling snap.

'Why are there two nails in her thumb?' Rihanna fans were baffled by a sizzling bikini picture of the star as they spot bizarre abnormality on her hand from a picture of her at the Crop Over festival in Barbados on Tuesday

‘Two thumb nails?’ one interrogated, before another chimed: ‘Photoshop look at her thumb she has 2 nails.’

#ChrisBrown couldn’t help himself lol! #Rihanna

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However, while some believed it could have been a Photoshop fail, it appears it could have been a piece of blue strap around her wrist poking out.

An explanation? The rogue nail could be a piece of blue string which Ri had tied around her waist and not the result of a Photoshop fail as some have suggested