The Fight For This Love hitmaker stunned fans on the opening night of the Girls Aloud comeback tour in Newcastle, England on Thursday night when she showed off the massive inking on the small of her back.
The design, two red roses in bloom, was completed after 15 hours in the tattooist's chair over an agonising two days last year, and Cole admits her latest body art will probably be her last.
She tells The Sun: "It was really painful but I think I'm done with tattoos now. It wasn't for any particular reason, I just liked the design. It took 15 hours in total.
"I actually got it five months ago - but it's somewhere on my body you wouldn't expect people to see it very often. It was done by this amazing artist called Nikko Hurtado who basically travels round the world going to conventions."
The star boasts a number of tattoos, including a Polynesian tribal symbol on her hand and barbed wire around her thigh.