All Seated on the Ground (2007)

The aliens have landed! The aliens have landed! But instead of shooting death rays, taking over the planet and carrying off Earthwomen, they've just been standing there for months on end, glaring like a disapproving relative. And now it's nearly Christmas, and the commission assigned to establish communications is at their wits' end. They've resorted to taking the aliens to Broncos games, lighting displays, and shopping malls, in the hope they'll respond to something! And they do, but in a way nobody ever expected, and Meg, the commission, and an overworked choir director find themselves suddenly caught up in an intergalactic mess involving Christmas carols, scented candles, seventh-grade girls, Alvin and the Chipmunks, Meg's Aunt Judith, Victoria's Secret, and Handel's Messiah.