CREATE TABLE table_204_420 (id NUMBER, "month" CLOB, "song" CLOB, "artist" CLOB, "aggregate points" NUMBER, "total downloads" NUMBER, "year-end chart" NUMBER)

other artist to end in the top two on the year end chart besides psy
SELECT "artist" FROM table_204_420 WHERE "artist" <> 'psy' AND "year-end chart" <= 2
SELECT "artist" FROM "table_204_420" WHERE "artist" <> 'psy' AND "year-end chart" <= 2