"O Little Town of Bethlehem"
From Tardis Wiki, the free Doctor Who reference
"O Little Town of Bethlehem" was a song sung by a group of humans, including Sarah Jane Smith, who had inadvertently been captured by a Hazoodian ship. (PROSE: Autaia Pipipi Pia)
"Oh Little Town of Bethlehem" was Jason Kane and Bernice Summerfield's favourite Christmas carol. It was sung at their wedding, led by the Isley Brothers. (PROSE: Happy Endings)