Alessandra Ambrosio

And my daughter really likes Justin Bieber, so I think she'll have fun watching him. But I think Rihanna is the perfect match for the Victoria's Secret show because she's really beautiful, she's really sexy, and she's really talented.

By irreducibly complex I mean a single system composed of several well-matched, interacting parts that contribute to the basic function, wherein the removal of any one of the parts causes the system to effectively cease functioning.