Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_21501564_1 (week__number VARCHAR, original_artist VARCHAR)

### Question ###
What week #(s featured sara bareilles as the original artist?

### Accurate SQL ###

SELECT week__number FROM table_21501564_1 WHERE original_artist = "Sara Bareilles"