A fresh batch of up-and-coming artists are hoping to compete for the $1 million grand prize in the 18th season of “America’s Got Talent.” International fashion icon Heidi Klum, beloved comedian Howie Mandel, and celebrated actress and global sensation Sofia Vergara join Executive Producer Simon Cowell on the judging panel once again. Terry Crews, the charismatic host, is back. Some of the most outrageous performers to ever take the “AGT” stage are expected to perform this season.