Martha Stewart, Jim Carrey, Julia Louis-Dreyfus, Ed Helms, and Olivia Munn (in Rachel Zoe) got some in-person face time last night at the launch of the new digital platform Airtime in New York City. The new browser-based service developed by Sean Parker (of Napster fame) is a Facebook-connected, video-chatting platform that’s also topic-based, allowing users to select a topic they may have “liked” on Facebook and talk to others who share similar interests. “SOOO fun w/everyone at #AirTime today!” Munn tweeted after the event. Click through to see more stars at last night’s hottest parties.