Rihanna posts topless picture to fans over Twitter

Is there no line that Rihanna won't cross? The singer, who is becoming more known for her bad behaviour than her music, has stepped things up a notch - sharing a topless pic with fans.

Rihanna posted the picture on Twitter last night (March 7) during filming for her new single 'Where Have You Been'.

Earlier this week Rihanna was criticised for an alleged 'racist' tweet to Chris Brown's girlfriend, Karrueche Tran.

The singer, who has been in the UK promoting latest album 'Talk That Talk', tweeted a photo of a pack of rice cakes adorned with an earring and sunglasses.

The picture, which included the tagline: 'Ima make you my bitch', is reportedly poking fun at former boyfriend Chris Brown's , half-Vietnamese girlfriend.

The two singers, who dated until Brown's infamous assault on Rihanna in 2009, both posted the new remixes online last month.

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