Photo Credit: Paul Drinkwater/NBC
"I am so in love with baby Maxwell," Simpson tweeted Tuesday. "I want to cry every time I look at her. Motherhood is by far the best thing I've ever experienced."
Simpson, who gave birth on May 1, couldn't have had better timing: The 31-year-old pop star/fashion designer/actress will get to celebrate her first Mother's Day this weekend. (And while baby Maxwell might be too young to pick out something nice for her mom, we're sure Jess' fiance Eric Johnson has something spectacular lined up for his baby mama.)
Simpson and Johnson aren't the only ones obsessed with their newborn daughter; Simpson's family is also pretty stoked.
"Bronx and I are in love with Maxwell already!" Jessica's younger sister Ashlee Simpson, who is mom to 3-year-old son Bronx, told People following her niece's birth. "Jessica has wanted to be a mom since we were little girls and I couldn't be more excited for her and Eric!"
And Jessica and Ashlee's father, Joe Simpson, took to Twitter to share his happiness.
"Proud PaPaJoe !! Beautiful baby girl," he tweeted. "What a miracle!"
Even though Jessica just had baby No. 1, she has already said she's ready to pop out a few more.
"Pregnancy was meant for me -- it really was," she told People in November. "I can't wait to have more kids. I love being pregnant. I have such an incredible connection with myself and with my body that I've never had before."