The X Factor Dublin auditions came to life on Saturday when Mary Byrne took to the stage and show her fellow constants how it is done.

The 50 year old Tesco worker, impressed judges Katy Perry, Cheryl Cole, Simon Cowell and Louis Walsh with a heartfelt rendition of Shirley Bassey’s ’ I Who Have Nothing’. Her performance left Cheryl close to tears.

Chatting to the cameras before her audition, Mary said: “I always sing at the till, I have to be told to shut up by the staff. What I really want to do is sing.”

She added: “I’m a really passionate singer. I want to be a legend tonight like Shirley Bassey or Tom Jones.”

Following her performance, Simon Cowell told her: “Mary, I think you’ve had the best voice out of everyone who has auditioned today. Seriously, seriously good. And actually, more than that, I really like you.”

Louis Walsh commented: “You picked a big, big song and you hit every single note. That was one of the best auditions and one of the most real auditions of the day.”

While a teary-eyed Cheryl added: “That was my favourite audition from Dublin so far. It was just full to the brim with power, emotion and passion. I thoroughly enjoyed it. In fact, I found myself getting goose bumps. It was fantastic.”

Guest judge Katy Perry said: “I think you’re very brave, I don’t know what ever stopped you, I think that you brought something that’s different.”

With comments like that, Mary could go a look way in this year’s competition.