CREATE TABLE table_1139835_3 (grand_finalist VARCHAR, scores VARCHAR)
SELECT grand_finalist FROM table_1139835_3 WHERE scores = "8.9 (57) – 7.12 (54)"
 ผู้เข้ารอบสุดท้ายด้วยคะแนน 8.9 (57) – 7.12 (54)
 who is the grand finalist where scores is 8.9 (57) – 7.12 (54)