This is one way to spice up the family Christmas note that you send the relatives.Kim Holderness, her husband, Penn, and their two kids created a now-viral video of them singing and dancing in Christmas pajamas because, Holderness says, her kids were just too rambunctious to sit still for a traditional Christmas photo.She and her kids spoke with HLN News Now about creating the Christmas hit.Here's the full experience:[video: http://www.youtube.com/watch?v=2kjoUjOHjPI] For more information p