CREATE TABLE table_22447251_2 (age INT, contestant VARCHAR)

How old is contestant Valerie Chardonnens Vargas?
SELECT MAX(age) FROM table_22447251_2 WHERE contestant = "Valerie Chardonnens Vargas"
SELECT MAX("age") FROM "table_22447251_2" WHERE "Valerie Chardonnens Vargas" = "contestant"