i think very generally speaking, people who go in to the arts have issues above and beyond most people. we've heard for years that the most successful comics often talk about their own painful experiences in a humorous way. we know that actors can be very demanding and diva-like. i think so much of it centers around the constant need for affirmation in an industry where you can become irrelevant (and poor) in a heartbeat.
the posts from your chick friend really make her sound like the poster child for neediness and attention. she probably can't get enough affirmation from those around her. i'd guess that many of her posts are 'liked' by many other females and there are a lot of empowering statements in the comments section, stuff like "i know, right? i thought i was the only who noticed that!", or "you nailed it, girlfriend!", or "we're right there with you through thick and thin. don't give up your dream!" and so on.