Isaac Atkins is a Golden Buzzer. Auditioning for “America’s Got Talent” Tuesday night, the Lewiston native took no time at all to impress for former Spice Girl Mel B. At the end of Atkin’s performance of the Four Seasons’ song ‘Beggin,” Mel B stood decisively at the judges table. “Before anybody else does this,” she said, “I’m going to do it.” She then smashed the legendary Golden Buzzer, which automatically advances Atkins — no votes from the other judges needed.