i read this on thefutoncritic.com :
NIP/TUCK - Portia de Rossi ("Arrested Development"), Oliver Platt ("Huff") and Lauren Hutton ("Central Park West") have all landed multi-episode arcs on the show's upcoming fifth season. De Rossi will play a manipulative lesbian mother whose teen daughter wants to have plastic surgery while Platt is set as the producer of a TV show on which Sean McNamara (Dylan Walsh) and Christian Troy (Julian McMahon) serve as consultants. Hutton then will play a Hollywood publicist who will bring her star client to McNamara/Troy to get work done. Platt and Hutton's arcs are for at least five and three episodes respectively while de Rossi's commitment wasn't specified. Meanwhile, co-star Joely Richardson has agreed to appear in 15 of the 22 episodes set to be produced for the new season. The news spells the end of speculation that Richardson wouldn't return following a serious health scare with her teen daughter, who is now understood to be in good health. Richardson, much like Walsh and McMahon, has also received a significant pay bump for her duties this season as industry insiders suggest she'll earn nearly $100,000 per episode.