The 'Womanizer" hitmaker had three shows lined up for the town before adding one more.
"It is her first trip to Australia and she is really excited. We really wanted more shows in Melbourne ... so we talked at length with her management and they thought why not," News.com.au quoted Paul as saying.
Spears will play at Rod Laver Arena from November 11-13, after which she"ll perform in Sydney and Brisbane. Ultimately, she will come back to Melbourne for her final show on November 27.
Paul added: "It is by far the biggest pop spectacle to be seen here in years."