CREATE TABLE table_204_484 (id DECIMAL, "song" TEXT, "artists" TEXT, "release" TEXT, "year" DECIMAL, "notes" TEXT)

which artist name appears the most on this chart ?
SELECT "artists" FROM table_204_484 GROUP BY "artists" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "artists" FROM "table_204_484" GROUP BY "artists" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1