Dalton Harris will duet with James Arthur during this weekend's 'X Factor' final.

Dalton Harris

Dalton Harris

The bookies' favourite - who is mentored by Louis Tomlinson - will perform what he hopes will be his winning track with the talent show's 2012 champion on Sunday (02.12.18), if he makes it to the final two.

Each of the remaining three contestants will collaborate with a top artist to boost their changes of winning the show and landing a Christmas number one.

Anthony Russell - also one of Louis' acts - will perform with indie rockers the Kaiser Chiefs ins a bid to dazzle viewers.

Scarlett Lee - who is mentored by Simon Cowell - has been paired with 2006 winner Leona Lewis who is hoping to score her first No1 single since she released 'Run' in 2008.

The final two performers will sing their potential Christmas topper on Sunday in front of both their mentors and fellow judges Robbie Williams and Ayda Field - but only the champion will get the chance to release it.

A TV insider told The Sun newspaper's TV Bizarre column: "The X Factor no longer has a monopoly on the Christmas no1 like in the early days, so this exciting spin on the winner's single will ensure it is in the running.

"James, Leona and the Kaiser Chiefs are friends of the show and were happy to lend their vocals to the winner's singles, even though only one of the records will see the light of day.

"While Dalton, Anthony or Scarlett have to share the glory, the chance to collaborate with one of the country's biggest acts on their first ever release is an added perk."

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