The hashtag is closely associated with Twitter, and fans of the service use the hashtag as short-form creative expression.

WSJ: Facebook Working on Incorporating the Hashtag

Music is deeply engrained in Indian culture and people see it as a form of self-expression.

FORBES: 3 Reasons To Use Digital Music To Reach Indian Consumers

From the runway to main street, nail art has emerged as a democratic form of self-expression in which anyone can participate.

CNN: On main street and the runway, nail art is the new lipstick

Ultimately, fashion is a form of self-expression, and students should be allowed to experiment with their personal style, especially during the formative years of middle and high school.

CNN: The right way to wear leggings in school

Unlike earlier philosophers and idealists, who believed that their languages could perfect humanity, modern conlangers tend to create their languages primarily as a hobby and a form of self-expression.

NEWYORKER: Utopian for Beginners

It was satire, an age-old and completely legitimate form of expression.

FORBES: Birthers Sue Esquire Over Parody, Seeking More than $200 Million

Ms. LATIFAH: For me, hip-hop has been the catalyst for everything, a form of expression, a way for me to kind of get my feelings out and, you know, release whatever is going on inside.

NPR: Queen Latifah on New HBO Movie 'Life Support'