Someone mistook me for the thinnest person in my class!

So there is this really thin girl in my class, who I am jealous of and aspire to and stuff because of her thinness. So today, when I was reading a book at break (lol i don't eat lunch, what else would I do, and there isn't the option of walking around at break either) and these girls all went up to me (my face was down) and were like," OH is that you Vicky? Hi Vicky, wanna go out to town with us over the weekend?" So I look at them and then they realize that I'm not Vicky, but in fact Marceline!
I was so happy at that because Vicky is litereally stick-thin. I can't believe they mistook her for me.