For Chanukah - Light One Candle, Hayu, Hayah - Peter, Paul, & Mary - from their PBS Holiday concert, Safam's (a Jewish American rock band from Boston) - "Al Hanissim" (for the miracles), from the Hebrew liturgy, and sung in Hebrew.
Christmas music - anything by Mannheim Steamroller & the Transiberian Orchestra, traditional carols, Handel's entire Messiah, Emerson Lake, & Palmer's "I Believe in Father Christmas," Jethro Tull's "Christmas Song"
There are only three songs I will NOT listen to - "Grandma Got Run Over by a Reindeer" (horrible thought, even if it is done tongue in cheek), Brenda Lee's "Rockin' Around the Christmas Tree" (sorry, I just can't stand her voice), and I don't care for "Jingle Bell Rock."