Hilary Duff was spotted out shopping in Glendale on Monday, dressing in a patchwork circa-1960s-style blue sundress with a big brown belt and a pair of retro-looking sunglasses.

The 20-year-old singer does Pilates workouts three times weekly “for flexibility and toning” and gets her cardio boost from doing Piloxing. Says Hil, “I was a gymnast before, so I was a bit more bulky in the past. [Now] I have leaner longer muscles, my strength is up.”