The holidays are a time for catching up with cousins, stuffing your face with food and, now, gratuitous lingerie. Canadian undergarment proprietor (how fancy does that sound?) La Senza is serving up the Cup Size Choir, a collection of lingerie-clad singers.

Labeled A-G(!), the high notes are based on the model's cup size. Don't expect any real-life Mariah Careys on here: The models got some serious help hitting the right note. The real goal is to show off the lingerie, which happens every time you press a key, and the model sings as she sinks into her plush, velvety bed.

The funky website currently has an automated version of "Deck the Halls," but the real fun is in making your own soundtrack by clicking on the keys and sharing your masterpiece with friends. "Jingle Bells" is cool, but we'd recommend recreating the "Beverly Hills Cop" theme, "Axel F." Keep reading to see a video introducing the ladies.