What kind of person constantly posts pictures of herself on facebook?

[Michelle]

she constantly and excessively posts pictures of herself dressed in different clothes, out with friends, in different poses, and make it seem like she's having the best time of her life. Her facebook is filled with pictures of her and she's constantly online updating her pictures. She likes to filter the pictures too and it's as if she gets dressed up, takes the pictures and poses for them just so she can put them on facebook.

What would motivate someone to act this way? I know lots of extremely extroverted people who don't do this so I think it's more than just her being extroverted. What would make someone want to put so much energy doing something like this?
lol nicole, are you also an attention whore and my question hit a nerve? lol