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 parties (party_email VARCHAR, party_id VARCHAR)
TABLE: CREATE TABLE party_services (customer_id VARCHAR)

### Question ###
Which is the email of the party that has used the services the most number of times?

### Accurate SQL ###

SELECT t1.party_email FROM parties AS t1 JOIN party_services AS t2 ON t1.party_id = t2.customer_id GROUP BY t1.party_email ORDER BY COUNT(*) DESC LIMIT 1