Madonna shocked fans when she posted a photo proudly showing off her hairy armpits on Thursday.

The controversial pop icon, 55, captioned the unusual snap declaring, "Long hair...... Don't Care!!!!!! #artforfreedom #rebelheart #revolutionoflove.’’

The singer raised her arm to display the underarm hair, while wearing a revealing black lacy corset.

Another Instagram caption revealed that Madonna was doing a photo shoot for L'Uomo Vogue.

It appears that even as a teen, Madonna let her underarm hair grow.

"Going to high school, I saw how popular girls had to behave to get the boys. I knew I couldn't fit into that. So I decided to do the opposite," she told Harper's Bazaar in December 2011. "I refused to wear makeup, to have a hairstyle. I refused to shave. I had hairy armpits."

Madonna’s racy social media snaps are becoming more and more regular.