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 customers (email_address VARCHAR, customer_id VARCHAR)
TABLE: CREATE TABLE complaints (customer_id VARCHAR)

### Question ###
Find the emails of customers who has filed a complaints of the product with the most complaints.

### Accurate SQL ###

SELECT t1.email_address FROM customers AS t1 JOIN complaints AS t2 ON t1.customer_id = t2.customer_id GROUP BY t1.customer_id ORDER BY COUNT(*) LIMIT 1