Washington, Mar 18 : Madonna is working on the last album in her contract with record label Warner Bros., and it will again be a compilation of her hits.

The `Material Girl' will reportedly record new songs this summer, which will be meant specifically for the forthcoming release.

The swansong album, which is currently untitled, is scheduled for a release in September.

It will be her first hits album after 2001''s GHV2, reports Contactmusic.

Madonna has previously released the `Immaculate Collection' in 1990.

In October 2007, the Queen of Pop signed a lucrative deal of 120 million dollars with promoters Live Nation. (ANI)