It's Barney the dog's last Christmas in the White House and he's been charged with making the holiday decorations super special this year. In his new YouTube video, A Red, White and Blue Christmas, the First Family's Scottie decks the halls of the White House with Christmas decor -- with a little encouragement from some famous faces like Olympians Nastia Liukin and Michael Phelps. "I'm glad the decorations are finally coming together – and you're using my favorite color, gold," says Phelps. After the house is draped in all the holiday trimmings, the First Lady helps Barney and his pal Miss Beazley bid farewell after eight years in office. So long, Barney!