poser

To pose: To pretend, to be somebody you're not, to be part of a culture or genre just to fit in.

1.one who pretends to be someone whose not.
2. who tries to fit in but with exaggeration

A person who attempts to blend into a specific social group.

1.) Simple Plan, Good Charlotte, Avril Lavigne and their fans.
2.) To pose and pretend you're not a conformist or a prep when you are.

a person - usually in middle or high school, who is insecure about him/herself and trys very hard not to be a "conformist" or a "prep," by doing things like: purchasing a skateboard or guitar, purchasing a great deal of clothing and accessories from hot topic, and listening to pop-punk bands such as simple plan, yellowcard, etc. usually, this supposedly "nonconformist" behavior just backfires on him/her, because now he/she is still conforming, just to a different group of people. so the moral of the story is to be yourself.

Someone whos acts like someone theyre not,but not realizing that there being fake, basically a loser trying to fit in.

One who attempts to appear to others as something they are not, especially by their manner of dress; a charlatan.

also 'poseur'