Kristin Cavallari, author of the newly released book Balancing in Heels and once-cast member on "Laguna Beach," has officially reached level 100 on the celebrity mother scale, as evidenced by a recent Instagram photo. The picture shows Cavallari in a teeny bikini, sporting those trendy reflective sunglasses and holding up a breast pump. To top it all off, she's tagged a luxury vacation company because she's celebrity enough to be a spokesperson for that.

Thank you @inspirato for this gorgeous view while I pump 🙌🏻 #DutyCalls #Inspirato

A post shared by Kristin Cavallari (@kristincavallari) on