Cara Delevingne is the latest celebrity to join the #FreeTheNipple campaign. She posted a male and female's body alongside each other, pointing out the similarities between the two. The male's side of the photo is captioned "free," while the female's caption reads "censored."

The model donned a "Free the Nipple" shirt in February on a visit to the American Ambassador. It is unclear if Delevingne is the female posing in the photo.

Bruce Willis' daughter Scout shared a snap of herself in May, topless walking around NYC on twitter.

"Legal in NYC but not on @instagram," she wrote, before adding, "What @instagram won't let you see #FreeTheNipple."

She originally posted the photos on Instagram, causing the app to delete her account. She uploaded a picture of the e-mail, stating she could reactivate if she follows the rules.

"We are happy to reactivate your account without the images that don't meet our policies. Instagram is made up of community members like you - and we want to ensure that we are providing the best experience that we can," it read.

"Thank you again for reaching out, and we hope this helps. We really appreciate your position on this matter!" it concluded.

Instagram explains in its terms of service that "You may not post violent, nude, partially nude, discriminatory, unlawful, infringing, hateful, pornographic or sexually suggestive photos or other content."

However, it allows pictures of violence and innuendo. Breast cancer survivors or women breastfeeding is considered violation by the site.

Rihanna had a similar experience with Instagram after posting topless photos from a Liu magazine shoot. They deleted the shots and threatened to shut down her account, so she took to twitter to share instead.

Do you support #FreeTheNipple? Let us know your thoughts in the comments section below.