What week # featured first solo as the theme?
CREATE TABLE table_21501564_1 (week__number VARCHAR, theme VARCHAR)
SELECT week__number FROM table_21501564_1 WHERE theme = "First Solo"
### Context: CREATE TABLE table_21501564_1 (week__number VARCHAR, theme VARCHAR) ### Question: What week # featured first solo as the theme? ### Answer: SELECT week__number FROM table_21501564_1 WHERE theme = "First Solo"