Singer Madonna has been accused by many online commentators of using the Paris terrorist attack to promote her album "Rebel Heart".

The 56-year-old posted a series of photographs to her Instagram page to offer support after 12 people were killed in the gun attack on French satirical magazine Charlie Hebdo's Paris office, reports dailymail.co.uk.

But as Madonna offered encouraging words in the captions for her social media images, she also provided some hashtags, which were in promotion of her new album.

Madonna posted an image that read "Je suis Charlie" (I am Charlie) with the caption: "These are very scary times we are living in. Ignorance breeds Intolerance and fear. We can only fight darkness with light! We are all Charlie! #revolutionoflove #rebelhearts."

"Revolution of love" is a track off her album Rebel Hearts, both of which she used as hashtags at the end of her post.

The controversy comes on the heels of the pop icon likening the recent leak of her album to a "form of terrorism" -- her comments coming just after the world was left in shock following the Sydney Siege.