In the Instagram.com footage the Umbrella hitmaker appears seated at a table while two of her friends dance in front of her, and some eagle-eyed fans thought they saw something they shouldn't have.

The viewers commented it looked like Rihanna was snorting cocaine, and she quickly took to social media on Tuesday (14Apr15) to refute the allegations.

Rihanna wrote, "Your lame a** got some f**king nerve!!! Any fool could se (sic) that's a joint that I'm basing with a cigarette (sic).

"Who tF (the f**k) snorts tobacco??!! FOH (get the f**k out of here) witcho (with your) 'never been to a rodeo so someone squeezing their nose means they're doing coke' lookin (sic) a**!!"