The tat artist responsible, Keith McCurdy, said: “I asked her why she wanted that and she said, 'It's kind of my motto in life for everything'. Instead of considering things to be mistakes, considering them lessons.”

He continued: “She said that she wanted to do it in gray, rather than black, because she wanted it to be more subtle," he added. "She didn't want it to draw too much attention.”

Earlier this week Rihanna- whose single Russian Roulette is at number two in the chart- claimed she’d love a film role as a lesbian assassin opposite Megan Fox.