Among Christian Dior dresses designed by the couturier himself and Yves Saint Laurent coats that transport you to Paris in the 1960s, my grandmother boasts equally as much of her proud finds from Zara and J.Crew alike. To her, it's not about labels: It's about what works. The most important lesson in mixing high and low, though, is that it's about your personal style, which is somewhat of a mantra for her. It's about taking someone else's creations and truly making them your own. Don't be afraid to style that beautifully tailored blazer with a fun sequin mini, or mix a black-tie skirt with a clean white T-shirt. She's even been known to reconstruct designer pieces to her liking, depending upon her fashionable mood. The possibilities are endless.