(YouTube link)
British sailors aboard the amphibious assault ship HMS Ocean lip-sync to Mariah Carey's Christmas recording while on their way home from what was originally supposed to be a seven-week deployment -but then they were diverted to Libya, and seven weeks turned into seven months. After a 225-day mission (176 at sea), they are stoked to get back to the UK by this Friday, in time for the holidays! Link
BTW, it is Mariah Carey's song, not Beyonce's.