I don’t think the problem begins with supermodels...Have you seen the kids shows that are on? It’s hard to find any that don’t revolve around crushes and hormones...Even Phineas and Ferb, one of my favorites, has a constant backstory of girls chasing boys.
Haven’t seen Phineas and Ferb, but as a mother, I recall horrid love notes from 7th grade girls to boys in their class over 35 years ago. In my time, admittedly sometime during the last Ice Age, it was there, but more subtle, if 11-12 year old girls are capable of being subtle.
Girls have always had crushes.