^ Yeah, Fei Fei can undoubtedly be and do sexy. She's an artist and she knows how to model (and strut) very damn well. All she gotta do is get in character from a decent presentation of outfit, makeup and hair and that's pretty much it. I'd say give her a femme fatale and the usual soft, elegant looks.
She can be the Butane, Jagodzinska, Barros or Dubled, Kocianova and Stegner of VS. The type of girls who doesn't have to do much or over do it. Understated and keeps it classic with a little effort here and there. They give it good without being loud.
But right, it's timing as well. Perhaps Fei Fei couldn't care less about the lingerie show. She's probably not interested? (Or her boyfriend is against it, or maybe it's her management or VS themselves.)