This crossover starlet has walked the line, hustled and flowed her way into the spotlight. Amy LaVere is packaging her own brand of swagger and is getting ready to share it with the World Financial Center. LaVere’s voice and upright bass packs a punch, no wonder why NPR featured her on Mountain Voices. Grab a taste of her alt-country, Americana blend on July 28 at the World Financial Center in Battery Park. The show is free and doors are at 6 p.m.