America's Got Talent returned on Tuesday for the second night of season 18 auditions, and the show kept the impressive display of skill going with a whole slew of new, jaw-dropping performances.The show's stalwart stars -- including judges Simon Cowell, Howie Mandel, Sofia Vergara and Heidi Klum, as well as host Terry Crews -- returned to the Pasadena Civic Auditorium as another group of hopefuls hit the stage to show off their skills.However, there were a few that clearly stood out -- and one t