I work in an open plan office. We have a new employee that started with us a few months ago. She is very young, under 25. From the beginning I was open towards her and friendly as normal, but an incident this morning has kinda annoyed me. She came in announcing that she'd broken up with her bf (bf is a huge scrote, she has talked about him at length already and the whole team said dump him). She decided to come over and ask if I was wearing makeup (no), then said BITCH loudly (so everyone in the vicinity heard) and then proceeded to state loudly that my jumper was inside out and laughed about it. I said something along the lines of thanks for telling me in the middle of the office (as if I was the type to get embarrassed this would be) and she kept going and then picked up my food and asked why have I got veg and tried to get others in the team to comment/laugh.
Should I let it go or pull her to the side and mention it?