Malukah

Judith de los Santos, known by her pseudonym, is a Mexican composer and singer. She is known for performing several of the zombies Easter egg songs in Call of Duty: Black Ops II. Of these songs are: On April 24th, 2015, Malukah performed with Elena Siegman and Kevin Sherwood in a choir arrangement of various songs from the zombies mode.
 * Where Are We Going
 * Always Running
 * Archangel (with Elena Siegman and Clark S. Nova)

Trivia

 * Besides Black Ops II, Malukah is known for singing songs in several other video games, including the Mass Effect series. She has also performed covers of video game songs.