Apparently this is the world's happiest Christmas song according to science

One scientist claims he has created the "happiest Christmas song ever".

The song, named Love’s Not Just For Christmas, uses a formula designed to produce the perfect festive tune, according to the Daily Mail.

The three-minute track features sleigh bells ringing in the chorus and 21 mentions of the word "Christmas" – proven to evoke happiness in people.

The formula for the song was created by Dr Joe Bennett, a Boston Conservatory musicologist.

"There is no simple formula for a successful song, and in practice, songwriters combine their own experience, musical skills and personal creative preferences when writing," he said. 

He studied the lyrics, tempo, musical key and vocals of 200 Christmas songs.

The type of singer was noted down and then the songs were broken down into nine broad themes.  

His study also discovered lyrics talking about Santa, snow, home, peace and love, along with sleigh bells in the chorus are important. 

He also found a major key (C major or A major), an average tempo of 115 beats per minute and 4/4 time were also key. 

The new Love’s Not Just For Christmas song, uses these features.  

It also features 21 references to Christmas day, as a recent study by the University of Vermont found it is a keyword in evoking happiness.  

Lyrics for the song were written by Harriet Green and Steve Anderson, who penned hits for Kylie and Britney Spears, the song can be found on Youtube and Spotify.

Mr Anderson said: "Over the years I have been lucky enough to have written and produced Christmas tracks and albums... hopefull, we’ve risen to the challenge and provided a song people will love not only this Christmas, but for every Christmas to come."

The song was recorded by the London Community Gospel Choir and there will be live performances to make shoppers happier at intu shopping centres around the UK over the Christmas period. 

LYRICS FOR THE 'WORLD'S HAPPIEST CHRISTMAS SONG'