It was a girls night out as Nicole Richie and Christina Aguilera headed to Voyeur nightclub in West Hollywood on Thursday together.

Nicole is heading back to TV - she's set to rejoin the cast of "Chuck" two years after making a guest appearance on the comedy.
 
The former reality TV star will reprise her role as Heather Chandler, the high school nemesis of Sarah Walker, in October in a scene involving a prison transfer gone wrong.
 
Richie originally appeared on the show in 2008.

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