My boyfriend of 8 months recently told me about this chick that started 2ish weeks ago at his work. He has mentioned that she's "cute" but has half a brain (from how he has explained it she seems to be acting dumb for attention). He has told me that she's showed him pictures of her hair at different colours and then after that proceeded to show him pictures of her crying even though he told her he didn't want to see them, who even takes pictures of themselves crying?? If not for attention which I told him she seems attention seeking. The more I hear about how she acts at work the more I'm like can't you just ignore her?? She's even gone as far saying she prefers his moustache over his beard like who she think she is... I guess maybe I'm just getting too irritated about this but she just seems to be trying to get his attention.

Seems like your ether jealous or overthinking it but you are probably right. The best thing to do is have a proper talk with your bf and if you can with the chick

Let her be seeking attention from your boyfriend - that's not a problem, that's normal. There will always be other girls around partners, at all.

But keep in mind that it's a problem if your boyfriend does give her attention.
I can only agree to what K said: talk to him. Properly.