The Wonder Girls have been ramping up their Stateside promotions.

It looks like they will be spending even more time in the US promoting, in addition to performing at 'Jingle Ball' the lovely girls will be promoting their newly released Christmas song, "Best Christmas Ever".

The song is included on the 25th Anniversary edition of 'A Very Special Christmas-Bringing Joy to the World 25th Anniversary' album. 'A Very Special Christmas', is a compilation album first issued in 1987 that featured such iconic holiday classics as U2's "Christmas (Baby Please Come Home)". The proceeds from the album support the Special Olympics and to date has raised over $100 million dollars.

In addition to the Wonder Girls, the album features holiday songs from a host of world class entertainers including Christina Aguilera, Francesca Battistelli, Michael Bublé, Cheap Trick, Vince Gill, Amy Grant, Dave Matthews, Jason Mraz, One Republic, Rascal Flatts, The Band Perry, and Train.

Check out the preview below and be sure to purchase the song and support the great cause!