CREATE TABLE table_41915 ("Date" TEXT, "Cover model" TEXT, "Centerfold model" TEXT, "Interview subject" TEXT, "20 Questions" TEXT)

Who was the Centerfild model that used Bruce Willis as her Interview subject?
SELECT "Centerfold model" FROM table_41915 WHERE "Interview subject" = 'bruce willis'
SELECT "Centerfold model" FROM "table_41915" WHERE "Interview subject" = 'bruce willis'