(CBS News) Twelve acts competed in the last quarterfinals round Tuesday night on "America's Got Talent ... show), Howard Stern and Howie Mandell were All That! (a clogging dance troupe), singer ...

Before "American Idol" and "Star Search," there was "The Original Amateur Hour," a televised talent show hosted by Ted Mack from 1948 to 1970 that featured singers and dancers, twirlers and ...