Lena Dunham, the successful creator of TV series "Girls," showed it's fine if you don't have the body of a Victoria's Secret model as she showed off her curves in a series of photos on Instagram. "I spent so many years loving my body but thinking it wasn't lovable by others," as she said.

Instagram and Snapchat ranked the worst social media network in terms of its impact on young people's mental health, a report said by the Royal Society for Public Health in the UK. Though Instagram received good marks on self-expression and self-identity of youngsters aged 14 to 24.

Hashtags like #bodypositive, #bopo (short for body positive), #bodyacceptance and #effyourbeautystandards have reached more than 5.6 million posts on Instagram. The hashtag #effyourbeautystandards, originally created by plus-size model Tess Holliday, established a virtual place on Instagram where everyone, mostly women, can share their stories and body images and show off their bodies in all sizes and shapes.

A debate within this body-positivity trend raised a question of whether social media sites such as Instagram, Snapchat and Facebook are helping harming people's perception of their bodies and their health.

The body-positivity trend on social media encourages people to proudly show off their unique body and unconventional bodies, claiming that fat bodies are not to be hidden but flaunted.

The super-size model Holliday and the "Girls" creator Dunham are now leaders on Instagram for promoting a new body-positive movement, as they are proud of it, to inform their followers that it is all about loving and accepting one's body as it is.

The latest post of Dunham's imperfect nude body image has obtained 67,777 likes and 1,505 comments so far, where she said proudly: "I feel deeply comfortable with the idea that this pear-shaped pot of honey is equally good for making people laugh and laying out like a Suicide Girl circa 2004. Love it all.”