Oxford a cappella group covers "All I Want For Christmas Is You"

This story was originally published on Dec. 11, 2014.

Need some holiday cheer mixed in with some British humor? Try Oxford University's amazing a cappella rendition of Mariah Carey's "All I Want For Christmas is You." Within three days, the video has already amassed more than 100,000 views.

Out of the Blue, Oxford's all-male a cappella group looked dapper while dancing and caroling along to the 1994 hit single, which turned 20 years old last month.

Filmed entirely on the Oxford campus, Harry Potter movie fans will recognize the background scenery as the primary filming locations for the Hogwarts School of Witchcraft and Wizardry. The a cappella group even got special permission to film inside the world renown Bodleian Library of Oxford, including the beautiful Old Schools' Quad and the Divinity School.

Out of the Blue put together the arrangement and the music video to promote the Helen & Douglas House charity. The charity provides support for families requiring children hospice care in the U.K.

The single is available for download here. All proceeds go to the Helen & Douglas charity.