CREATE TABLE table_1901751_1 (original_australian_performer VARCHAR, original_west_end_performer VARCHAR)

Who is the Original Australian performer when the Original West End Performer is Linzi Hateley?
SELECT original_australian_performer FROM table_1901751_1 WHERE original_west_end_performer = "Linzi Hateley"
SELECT "original_australian_performer" FROM "table_1901751_1" WHERE "Linzi Hateley" = "original_west_end_performer"