Nicole Scherzinger was reduced to tears by James Arthur's new single.

Nicole Scherzinger

Nicole Scherzinger

The 'X Factor' judge mentored the singer to victory on the 2012 series of the talent contest and is thrilled he has recently made a musical comeback with new song 'Say You Won't Let Go', which has topped the iTunes chart.

She shared a link to the video for the track and wrote: "I couldn't be more proud of my boy @JamesArthur23 I love this song, it moved me to tears. (sic)"

Following the success of the song, James has been resigned by Simon Cowell's Syco after he was previously dropped from the label in 2014 following a string of controversies.

A music source said: "Over the last few years James has kept in touch with Simon.

"Simon has always thought James is a real talent but as soon as he heard the record he made up his mind to re-sign him.

"James has grown up a lot and realises he made mistakes in the past. Simon knows this.

"Syco will distribute James's new album in the UK when it comes out later this year."

James enjoyed considerable success following his starring role on the British talent show, but his career took a sharp downward turn in light of a series of inappropriate Twitter rants and he was eventually dropped from the label.

Simon said that James' self-destructive attitude had led to him losing his lucrative recording contract.

He previously explained: "I think James unfortunately has had so many issues with what he has done.

"Somebody should have told him to shut up and just put the records out."

Now, though, it appears that James' career is back on track after enjoying chart success and being re-signed by Syco.

A spokesman for Syco said: "We can confirm that James Arthur is now once again signed to Syco Music in the UK. We are delighted to welcome him back into the Syco fold."