1 / 24

Jessica Alba

“One month ago, 9.5months pregnant,” the mom-of-three captioned this throwback taken just before she welcomed son Hayes into the world on Dec. 31, 2017. (Photo: Jessica Alba via Instagram)

Social Snaps (week of Jan. 28, 2018)

Check out what your favorite stars — including Jessica Alba and John Mayer — are posting on social media this week!