由大卫·哈塞尔霍夫,珊农·奥斯博内,皮尔斯·摩根领衔主演的美国达人第四季是一部综合评分9.0分的美国欧美综艺。The fourth season of America's Got Talent, an American television reality show talent competition, premiered on the NBC network on June 23, 2009. Country singer Kevin Skinner was named the winner on September 16, 2009. This season is the first season to be broadcast in high definition.
