Is it normal that my sister is a huge hypocrite and doesn't know it?

So my sister acts like everything I do and other people do is horrible and she would never do it but she does. She's basically a hypocrite but she won't admit it. Like I would say something like "you sleep a lot haha" and she would say "don't judge me!". The very next hour or so she would judge me for eating a lot or something stupid. She does this with a ton of things and not just to me. I've tried talking to her calmly about this but she says I don't know what I'm talking about and gets all mad. Btw, I'm 16 and she's 18.