How Taylor Swift and More Dance in Sky-High Stilettos
Quote:
Though Weitzman says the look of the shoe is paramount -- for Swift's 1989 Tour, he was given sketches of the costumes and instructed to create styles that complemented them -- style can't trump comfort. Accordingly, he adjusts the internal architecture, like adding a hidden latex pad in the ball of the foot for extra cushioning: "It offers the comfort of a platform without the instability."
Interesting read that includes other dancers like Madonna and Beyonce.