Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_22447251_2 (age INTEGER, contestant VARCHAR)

### Question ###
How old is contestant Valerie Chardonnens Vargas?

### Accurate SQL ###

SELECT MAX(age) FROM table_22447251_2 WHERE contestant = "Valerie Chardonnens Vargas"