Rihanna has slammed UK tabloid reports that she used a butt and body double in a new Armani commercial.

The suggestive black and white advertisement shows Rihanna writhing around in bed in her reg grundies having a nightmare before putting on a pair of jeans but according to the reports the ad actually features shots of a butt and body double. Apparently the shots are in fact of 27 year old Irish model Jahnassa Aicken who had reportedly signed a gag order to ban her from discussing the job.

Rihanna denies the reports. She says the tattoo on her hand proves the curves shown in the black and white ads are all hers and she has lashed out at The Sun in a series of angry Twitter.com posts. 

She writes, "Ok @thesunnewspaper, this is the only way I could say this to you!!! F**K YOU... Who is Jahnassa... Does she have a tat (tattoo) on her hand too?"