CREATE TABLE Performance (bandmate VARCHAR, SongId VARCHAR)
CREATE TABLE Band (firstname VARCHAR, lastname VARCHAR, id VARCHAR)
CREATE TABLE Songs (SongId VARCHAR, Title VARCHAR)

Who performed the song named 'Le Pop'?
SELECT T2.firstname, T2.lastname FROM Performance AS T1 JOIN Band AS T2 ON T1.bandmate = T2.id JOIN Songs AS T3 ON T3.SongId = T1.SongId WHERE T3.Title = "Le Pop"
SELECT "T2"."firstname", "T2"."lastname" FROM "Performance" AS "T1" JOIN "Band" AS "T2" ON "T1"."bandmate" = "T2"."id" JOIN "Songs" AS "T3" ON "Le Pop" = "T3"."Title" AND "T1"."SongId" = "T3"."SongId"