Sir Tom Jones has the power to ban pop stars from joining 'The Voice'.

Sir Tom Jones

Sir Tom Jones

The 79-year-old singer has been a judge on the ITV show since its first season, and he's now revealed the extent of his influence on the show, admitting he has the power to stop someone from joining the judging panel if he doesn't think they're the right fit.

Speaking about the decision to hire Meghan Trainor, Tom told The Sun Online: "They just asked me. They said: 'We are thinking of Meghan Trainor', and then I checked that out. Because she was on a talent show in the States."

Fellow judge Olly Murs was surprised by Tom's confession, saying: "Hang on a minute, when they said: 'We're going to have Olly Murs on the show', did they come to you first?"

And Tom quipped: "I said: 'Who?'

"But yeah really, ever since I have been on the show they have asked - but I won't tell you the ones that I said no to."

Meanwhile, Tom recently admitted he still has legions of women throwing themselves at him.

However, the iconic star confessed it is "mostly the grandmothers" who have the hots for him these days.

He shared: "It's mostly the grandmothers who fancy me. Some have got my name written across their chest."

Tom - whose beloved wife Linda died in 2016 - also revealed he finds it hard to believe he is almost 80.

Asked if he saw 30-year-old women as the right age for him, Tom explained: "Yeah, I do. You can't see yourself when you are looking at somebody else.

"I can't believe it when they say 80 years old because when you are young and you think 80 it sounds old."