Hollywood beauty Jessica Alba never suffers from nerves when she's required to go nude in front of the cameras - because she enlists a pal to strip off for her. The Fantastic Four star admits she hates getting naked in front of the camera crew, so she brings in a body-double friend to perform the raunchy scenes. Alba - who is expecting her first child with fiance Cash Warren - says, "In my new movie it is a girlfriend of mine in the shower scene. She stood in for me. I do not want to be naked in front of the crew. It makes me nervous."