madonna-kids-rebel-heart

Material Mom Madonna posted a photo of her four children – Lourdes, 18, Rocco, 15, David, 10, and Mercy, 9 – via Instagram Friday.

“The 4 corners of my #rebelheart,” the pop superstar, 57, captioned the photo montage.

The Queen of Pop is currently on her Rebel Heart world tour.

The mom-of-four performs in the U.S. and western Canada before taking her act to Europe, Asia and Australia.

The 4 corners of my ??#rebelheart

A photo posted by Madonna (@madonna) on Oct 9, 2015 at 7:29pm PDT