CREATE TABLE table_27441210_12 (weeks_at__number1 INT, artist VARCHAR)

How many weeks was K.Maro at #1?
SELECT MAX(weeks_at__number1) FROM table_27441210_12 WHERE artist = "K.Maro"
SELECT MAX("weeks_at__number1") FROM "table_27441210_12" WHERE "K.Maro" = "artist"