The competition is heating up on American Idol, and Lauren Alaina and Haley Reinhart both brought out the feminine frocks on last night's Carole King episode! We caught up with the show’s costume designer Soyon An for the inside scoop. "This dress was free and floaty, sparkly and cool," An said of Reinhart's fluttery Haute Hippie number (right). As for Lauren, the stylist settled on an asymmetrical Allen Schwartz dress (left). "It's trendy, fun and girly," An said of the look, which also included Wet Seal earrings and vintage boots. Click through for more details about their outfits!