Jazz pianist and singer Diana Krall is cancelling her U.S. fall tour to give herself time to recuperate from a severe case of pneumonia.

Krall, in a statement released Thursday by her publicist, says she's "deeply saddened" about the postponement, but is "under doctor's orders to rest for the next few months in order to regain my strength and good health."

The tour was scheduled to kick off Nov. 7 in Phoenix, and new tour dates will be announced later.

Krall also is putting off the release of her new album, Wallflower, from Oct. 21 to Feb. 3.

On the CD, Krall breaks new ground for herself by interpreting a collection of pop songs from the 1960s to the present day by the Mamas and the Papas, the Eagles, Bob Dylan and Elton John as well as a new song by Paul McCartney.