Pop icon Madonna sparks outrage over usage of Nelson Mandela, Martin Luther King pictures in new album

Madonna has sparked outrage after comparing herself to Nelson Mandela, Martin Luther King and others in order to promote her new album 'Rebel Heart'.

The 'Material Girl' hitmaker posted a series of images of several great leaders, and photoshopped black rope onto their faces similar to her 'Rebel Heart' album cover on Twitter, People Magazine reported.

The 56-year-old captioned the pic of Bob Marley with black rope around his face, "This #rebelheart sang about ONE LOVE!". On Luther King's pic, the American singer wrote, "This #rebelheart had a dream!"

The Queen of Pop captioned the Instagram pic of Mandela as, "This #rebelheart fought for freedom!". Six songs from Madonna's album were leaked online before their official release.

Here are some pictures from Madonna's twitter account.

This❤️#rebelheart fought for freedom! pic.twitter.com/7OxGT28TuY

— Madonna (@Madonna) January 2, 2015

This ❤️#rebelheart had a dream! pic.twitter.com/PIwcwosS2G

— Madonna (@Madonna) January 2, 2015

This❤️#rebelheart sang about ONE LOVE! pic.twitter.com/7RGdpL4yzy

— Madonna (@Madonna) January 2, 2015