Mom-to-be January Jones left a yoga class in LA yesterday in a curve-hugging tank. The actress has been hanging out close to home on the West Coast, focusing on her fitness and reuniting with friends at a Malibu Memorial Day bash, since hitting the road to promote her turn as Emma Frost in X-Men: First Class late last month. The highly anticipated film opened this weekend and took the top spot at the US box office with $56 million. January is taking advantage of a brief lull in her work schedule to focus on her health and wellness, and during our recent interview with her, she told us she's in "nesting mode" as she awaits her new arrival. The next season of Mad Men begins filming late next month, so it remains to be seen how January's real-life pregnancy will affect her onscreen role as Betty Draper. The single mom announced that she was pregnant back in April, and has yet to reveal the identity of the father, and her ex-boyfriend Jason Sudeikis seemed to crack a joke about it while he hosted the MTV Movie Awards on Sunday.