One of my favorite singers, Anna Gilbert has a Christmas album for free today at Noisetrade.com/annagilbert!
If you like mellow, acoustic/folk-sounding music sung by a singer with a pretty voice, give her music a listen.
You can also find quite a few other Christmas albums (as well as a bunch in many other genres) on Noisetrade, and it's all free (and legal). Enjoy! :)