Jennifer Hudson brought the house down and did so with the help of a few friends during her Atlanta show at the Fox Theater last Thursday.  The original singer of “And I’m Telling You (I’m Not Going)” Jennifer Holiday surprised the crowd and joined Hudson onstage for an unforgettable co-rendition of the classic R&B hit.  Not giving fans much time to settle down from the excitement, Hudson then invited fellow American Idol contestant Fantasia to sing her half of their duet and Grammy-nominated song “I’m His Only Woman.”  Atlanta marked the “Spotlight” singer’s second sold out show for the tour. Hudson will be on tour with Robin Thicke through May 15.–PS