One source claims the 18-year-old was actually bullied for being there -- apparently not everyone thought she earned the right to walk the shows!
The insider spilled:
If a guy accompanies you on a shopping spree, he's a KEEPER!
The two looked very fashion forward together even if the t-shirt and jeans clad Joshua was upstaged by Diane in her green print Marni dress and light beige Salvatore Ferragamo tote.
What a PERFECT boyfriend!
Diane, you better hold on tight to this one!
[Image via Splash News.]