CREATE TABLE table_15796072_1 (original_artist VARCHAR2, week__number VARCHAR2)

Who was the original artist for week number Top 16 (8 women)?
SELECT original_artist FROM table_15796072_1 WHERE week__number = "Top 16 (8 Women)"
SELECT "original_artist" FROM "table_15796072_1" WHERE "Top 16 (8 Women)" = "week__number"