CREATE TABLE table_name_67 (artist VARCHAR, album VARCHAR, label VARCHAR, credit VARCHAR)

Who was the artist for the album, Christmas under the reunion label with the guitar?
SELECT artist FROM table_name_67 WHERE label = "reunion" AND credit = "guitar" AND album = "christmas"
SELECT "artist" FROM "table_name_67" WHERE "album" = "christmas" AND "credit" = "guitar" AND "label" = "reunion"