Britney did “How I Met Your Mother.” Lindsay did “Ugly Betty. Next up, in the TV stunt casting derby, Nicole Richie on “Chuck.” This one may be the most fun, with Richie in a girl fight with Yvonne Strahovski (Sarah), Chuck’s CIA-appointed boss. NBC says that Nicole’s character will be a “sarcastic and spiteful girl who tortured Sarah at school.” In the episode, set for mid-October, Sarah “must face her fears when she is forced to attend her 10-year high school reunion,” after Nicole’s character also shows up.