Celebrity Parents Pregnant Jessica Simpson Is Sad About 5-Year-Old Son Ace's 'Short' Haircut: 'It Broke My Heart' In a Wednesday Instagram post, third-time mom-to-be Jessica Simpson lamented the absence of her 5-year-old "little man" Ace's long locks By Jen Juneau Jen Juneau Twitter Jen Juneau is a digital news writer for PEOPLE. A '90s teen and horror film connoisseur, she started at the brand in 2016, after a decade of working as a technical writer and then moonlighting as a journalist beginning in 2013. Originally from New Orleans, Jen grew up both in NOLA and Florida and eventually attended the University of Central Florida in Orlando (still her home base!), where she earned a bachelor's in English/technical communication, with a minor in magazine journalism. People Editorial Guidelines Published on December 26, 2018 03:30 PM Share Tweet Pin Email Ace Knute is growing up so fast — and he’s got the ‘do to match. Jessica Simpson‘s 5-year-old son is quite the suave youngster in a black-and-white photo the singer shared to Instagram Wednesday, taken while Ace sits in the barber’s chair following his chop. Offering a wide grin to the camera, the adorable little boy sports a style much different than his usual longer blond locks, spiked up and to the side to finish the look. Neilson Barnard/Getty Images; Jessica Simpson/Instagram “He really wanted short hair. It broke my heart a little, but we did it!! My little man 💚 #ACEKNUTE,” Simpson, 38, captioned the cute snapshot. Want all the latest pregnancy and birth announcements, plus celebrity mom blogs? Click here to get those and more in the PEOPLE Parents newsletter. Jessica Simpson’s Daughter Maxwell, 6, Has a “Favorite” Makeup Item: “She Tends to Sneak It” This isn’t the first time Simpson has shown emotion over her son’s changing look. In September 2017, the singer, actress and fashion designer gave her followers a peek at Ace’s first-ever haircut at the age of 4. The little boy’s signature shoulder-length blond locks had been sheared to reveal a shorter, yet still adorably shaggy style as the little guy waded in the water in front of a stunning mountainous landscape. “First haircut ✔️ (Thanks @jessieholiday for making my stud look all grown up 😢) #ACEKNUTE,” the proud mama captioned the memory. Jessica Simpson/Instagram RELATED VIDEO: Pregnant Jessica Simpson Covers Her Bump in Furry Reindeer Onesie: “I Love the Holidays” While Ace is the baby of Simpson and husband Eric Johnson‘s family for now, he’ll soon be a big brother when his little sister arrives — and in the meantime, he and sister Maxwell “Maxi” Drew, 6½, have some questions for their pregnant mama. “They want to know every detail — like how milk comes out of Mommy, how the baby will actually get here and if my belly button is a speaker to communicate with the baby,” Simpson explained to PEOPLE exclusively in October, choosing just a few of her kids’ silly inquiries. The soon-to-be mother of three added that she and Johnson, 39, “are constantly cracking up and trying to figure out how to be honest … but not traumatize them or the friends and teachers we know they are sharing every detail with!” And looks like Ace and Maxwell will get a little baby practice in ahead of their little sister’s arrival — the siblings were gifted Shih Tzu puppies for Christmas. “Santa’s Nice List!” Simpson captioned a photo of her kids with their new dogs.