11 items in this article Photo-Illustration: The Strategist; Photo: Courtesy of the subject, Joe McKendry If you’re like us, you’ve probably wondered what everyday stuff famous people add to their carts — like hair spray or an electric toothbrush . We asked violinist Ray Chen , who will be performing at Carnegie Hall with the National Youth Orchestra of the United States of America on July 20, about the sheet-music-reading apps, massage balls, and inflatable neck pillow he can’t live without.