The singers of the month for December are New Music Divas
We have fairly substantial articles on Meredith Monk and Dawn Upshaw, although the latter would benefit from formatting of the inline citations.
The following articles are stubs needing expansion: Bethany Beardslee, Joan LaBarbara, Cathy Berberian, and Jill Gomez
We lack articles on:
Judith Bettina, who has had works written for her by many noted contemporary composers including Charles Wuorinen, Milton Babbitt, Richard Danielpour, and Tobias Picker.
Jane Manning, who has premiered over 300 new works, including Elisabeth Lutyens' The Valley of Hatsu-Se and has made definitive recordings of song cycles by both Arnold Schönberg and Olivier Messiaen.
Cyndia Sieden, who created the role of Ariel in in Thomas Adès' The Tempest
Christine Whittlesey, who sang the female lead in Du jour au lendemain, Straub and Huillet's opera-film of Schönberg's Von heute auf morgen and has sung in the premieres of several 20th century operas including Olga Neuwirth and Elfriede Jelinek's Bählamms Fest
Susan Narucki, who has appeared in world premieres of many contemporary operas, including Louis Andriessen and Peter Greenaway's Writing to Vermeer, Claude Vivier's Reves d'un Marco Polo and Libby Larsen's Every Man Jack.