So the question is, since she also said that her dress was going to be FAB, I went ahead and picked two choices for her.
The first one here is a nude shimmer wrap gown by Victoria Beckham in her latest Fall 2010 collection. VB has been red hot on the red carpet and I think it's time Serena embrace the VB fever. The color would compliment Serena's skin color and the nib at the waistline is exactly what she needs. It's so old school hollywood, plus Serena has enough sassiness to give this gown some extra youth and energy.
The second one I chose is a total different route for Serena, in fact this one would look amazing on Venus too. It's a black and white strapless Zac Posen gown with a pleated bottom and ruching detail on the bust. It's elegant, which is the look I think both sisters general prefer nowadays. I like how the bottom of the dress flares and drapes nicely which is going to be super flattering. I particularly like the ruching around the bust, the texture is only going to be enhanced by Serena's figure. The dress is just so simple yet stunning. And the best thing is this dress can be dressed with or without a necklace, which would save Serena from all the blogger's "I hate jewelry" comments, cuz this time it WORKS.