CREATE TABLE table_24379 ("#" FLOAT, "Japanese title" TEXT, "R\\u014dmaji" TEXT, "Japanese translation" TEXT, "Vocalist" TEXT, "Episodes used" TEXT)

Name the number of vocalists for which one ~ is it?
SELECT COUNT("Vocalist") FROM table_24379 WHERE "Japanese translation" = 'Which One ~ Is It?'
SELECT COUNT("Vocalist") FROM "table_24379" WHERE "Japanese translation" = 'Which One ~ Is It?'