Jessica Simpson can't stop gushing over her baby Maxwell.
"I'm addicted to buying headbands w massive flowers for Maxwell on etsy! She is insanely beautiful I can't help but play dress up!," the Fashion Star host, who said she's "so in love" with her daughter, wrote Saturday.
And Simpson isn't the only star mom or mom-to-be who hit the Twitterverse to gush about their kids, moms and Mother's Day in general in honor of the mom-tastic day.
Nicole Richie: "Happy Mothers Day to all the moms, stage moms, teen moms, and mofo's around the world x."
Kourtney Kardashian: "Happy Mother's Day to all of the women who are blessed to be able to be a mother...my favorite thing to be!"
Snooki: "Happy Mother's Day to my amazing mother and all the mommy's out there!!!!"
Mariah Carey: "Happy mother's day to my mom and all the wonderful moms out there. Every day should be mother's day: )"
Kristin Cavallari: "Happy mothers day"
Kendra Wilkinson: "Just got home to LA from Miami and had flowers on the table and dinner ready for me by my love. Perf start to Mothers Day :)"
Jennifer Lopez: "Up late playing cards with my Mommy!!
#besttime #familia Happy Mothers Day to all the Mamas out there."