January Jones is hanging around in plunging lace underwear while battling L.A.'s blistering, 109-degree heatwave. The "Mad Men" actress, usually rocking a bikini or her trademark old-fashion nighties on her Instagram, updated her account over Labor Day weekend with another red hot shot – this time, showing her 1 million followers how she keeps cool. January, 42, has been making pandemic headlines for joking that she's unemployed and needs "attention." Her Sunday update has been receiving plenty. Check it out below.