text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE customers (email_address VARCHAR, customer_id VARCHAR); CREATE TABLE complaints (customer_id VARCHAR)
  ### Question:
  Find the emails of customers who has filed a complaints of the product with the most complaints.
  ### Answer:
  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