CREATE TABLE table_name_73 (week_2 VARCHAR, week_4 VARCHAR)

Who was the girl on week 2 that was previous to week 4's Chelsie Loraine?
SELECT week_2 FROM table_name_73 WHERE week_4 = "chelsie loraine"
SELECT "week_2" FROM "table_name_73" WHERE "chelsie loraine" = "week_4"