Not everyone's happy to go hi-def. "I don't know why anybody really wants to see people in hi-def," Private Practice star Kate Walsh tells TV Guide at a June 28 party for skincare maven Kate Somerville in L.A. "Do we need to see people's pores and their sweat?"

Molly Sims says shooting Season 5 of Las Vegas in high-definition has taken her makeup routine to a whole new level. "They airbrush because you see every kind of makeup," she explains. "Touch-ups are during lunch. Like 20 times." Such a regimen, she says, can take a toll. "Put it to you this way: I now wash my face twice a day." And when it comes to close-ups, Walsh had a word of advice, "You pray for a good lighting person." - Reporting by Bekah Wright