Hayley Williams arrived at the Billboard Women in Music Luncheon wearing a white striped raglan crop top and sheer overlay skirt from Christian Siriano Spring 2015 Ready-to-Wear (not available online). You can buy similar black peep-toe slingback shoes from Macy’s ($49.99, pictured), Dorothy Perkins ($59.00), ASOS ($77.04), or Forever 21 ($34.90).