Yo! Milk: TV Ad Challenging X- Factor Christmas Top Spot

Last year it was Rage Against The Machine - this year a rap song selling milk is set to challenge The X Factor winner for the coveted Christmas No 1 slot.

The music from the Yeo Valley advert - which features four rustic rappers 'bigging up' the West Country dairy's products - has become hugely popular since it was first shown during the show's commercial breaks.

The Sunday after it was first aired it went on to be featured as a 'top trend' on You Tube's home page - and since then has been watched online 1.5million times.

Unlikely rappers: The rustic foursome from the Yeo Valley adverts could soon be enjoying chart success

The advert sees the unlikely rap stars dressed in flat caps and wellies, and features the lyrics 'rollin' with my Massey on a summer's day' - in reference to the quartet's tractor.

It was made by Los Angeles based director Julien Lutz, who has made music videos for a host of stars including R Kelly, Usher, Kanye West and Nelly Furtado.

Among the 'rappers' in the advert is 21-year-old Alexandra Evans, who was the winner of the fourth series of Britain's Next Top Model.

Model rapper: Former Britain's Next Top Model winner Alexandra Evans features in the commercial

'I'm really surprised so many people like it,' she said of the song. 'Getting the Christmas No 1 is a long shot but who knows?'

Yeo Valley, which is based in Somerset, has committed to showing the commercial exclusive during breaks in The X Factor, at a cost of £5million.

The track was released for download via iTunes due to public demand, after Facebook groups calling for its release were set up and fans took to Twitter to air their views.

The Massey massive: The rappers pay tribute to their tractor in the tongue-in-cheek track

Among those who have shown their support for the track are Radio 1 DJ Zane Lowe, who is known as a champion of new music.

'Must be intimidating for The X Factor finalists to have to compete with the infinitely better Yeo valley crew each week,' he recently said on his Twitter page.

A spokeperson for the dairy added, 'It's not your usual chart topper but the positive response from the public suggests people want to hear it in the top 40.'

Dairy good: The track could pose an unusual threat to The X Factor winner for the Christmas No 1 spot

However the song is not the only one which is being championed to reach the top spot in the Christmas chart, with a number of campaigns popping up on Facebook.

Several pages have emerged to push the Sixties hit Surfin' Bird by The Trashmen, which was made famous by the film Full Metal Jacket, while there are growing campaigns to see Rick Astley's Eighties hit Never Gonna Give You Up and Meat Loaf's Bat Out Of Hell at number one for Christmas.

Also gathering momentum is the four and a half minute silent track by John Cage, which some Facebook fans have dubbed 'Cage Against The Machine' in reference to last year's Christmas campaign on the social networking site.

That one saw Rage Against The Machine's Killing In The Name deprive 2009 X Factor champion Joe McElderry of the festive chart-topper with his winner's single The Climb.