CELEBRITIESPhotos: Amber Valletta Steps Back Into the SpotlightThe Blood and Oil star talks about her complicated character—and how she dresses for the part.by Emilia PetrarcaSep. 25, 20151Amber Valletta as Carla Briggs. Photo by Kurt Iswarienkio/ABC via Getty Images.2Amber Valletta on the “Blood and Oil” set. Photo by Fred Hayes/ABC.3Amber Valletta on the “Blood and Oil” set. Photo by Fred Hayes/ABC.