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 Songs (SongId VARCHAR, songid VARCHAR, title VARCHAR)
TABLE: CREATE TABLE Performance (bandmate VARCHAR, SongId VARCHAR)
TABLE: CREATE TABLE Band (id VARCHAR, lastname VARCHAR)
TABLE: CREATE TABLE Instruments (instrument VARCHAR, songid VARCHAR, bandmateid VARCHAR)

### Question ###
What instrument did the musician with last name "Heilo" use in the song "Le Pop"?

### Accurate SQL ###

SELECT T4.instrument FROM Performance AS T1 JOIN Band AS T2 ON T1.bandmate = T2.id JOIN Songs AS T3 ON T3.SongId = T1.SongId JOIN Instruments AS T4 ON T4.songid = T3.songid AND T4.bandmateid = T2.id WHERE T2.lastname = "Heilo" AND T3.title = "Le Pop"