In 1998, Morissette played a free show at Auckland's Aotea Square to a crowd of 15,000 people.
The Canadian singer won album of the year and best rock album at the 1996 Grammy awards for Jagged Little Pill.
The 45-year-old has kept herself busy with a monthly podcast and a Broadway musical named after her iconic album which debuted last December.
She released a new song Reasons I Drink last December, from her upcoming ninth album Such Pretty Forks In The Road. The album is due for release May 1.
Alanis Morissette plays one show at Auckland's Spark Arena on April 21.
Tickets go on sale this Friday at midday.