What is your best friend's most annoying habit?

I have this close friend that she always ntoices the things I buy as well as my new things like if i have bought new clothes, bag, or shoes. She will say "Why do you have a new shoes?", " Why did you go shopping?", or something like it. I find it annoying because first I dont care if she has new things or not. I find it that she is jealous because I can buy things I want and she is limited to buy things because she has a baby to attend to sicne she is a single mom. Most of the time I just let it go but still getting to my nerves. In my opinion, She doesnt need to do a self pity on herself because I think people will think she doesnt like the baby.