By Breaking Celebrity News Staff

Jessica Simpson is in love -- with baby Maxwell!

The Fashion Star mentor, 31, took to Twitter to gush about her newborn daughter, Maxwell Drew Johnson, born just a week earlier.

"I am so in love with baby Maxwell,"  she wrote Tuesday. "I want to cry every time I look at her. Motherhood is by far the best thing I've ever experienced."

Maxwell is Jessica’s her first child with fiance Eric Johnson.