He’s growing up! Jessica Simpson‘s youngest son Ace isn’t a baby anymore. The pop star took to Instagram last week to share a photo of his latest milestone — his first haircut! The adorable four-year-old has rocked long blonde locks for a while now and he looks just as cute with a shorter, clean-cut look. Watch the video below to see the photo of Ace’s new haircut!

Even though the mama was proud to show off her baby boy’s new ‘do, many fans were quick to leave rude comments about Ace. “Yay!! So much better. You can tell he’s a boy now,” one fan wrote, and another commented, “Now you can see that cute face…long hair belongs on girls, not boys.”

But it looks like Jess didn’t pay any mind to the trolls because she knows that she makes beautiful babies no matter what. She shares Ace and five-year-old daughter Maxwell with former NFL star Eric Johnson and it looks like they’re not looking to expand their family anytime soon. Back in May, Jessica stopped by The Ellen DeGeneres Show for the first time where she was not pregnant during her appearance. She also dispelled any rumors about whether she was pregnant for the third time.

View this post on Instagram

#ACEKNUTE #4 🎉 @baylormcg // 📸@kristingram

A post shared by Jessica Simpson (@jessicasimpson) on

“We got an IUD, nothing is gonna get in that uterus,” she joked. “I have two beautiful children and I’m not having a third, they’re too cute — you can’t top that.”

The fashion designer’s kids really are adorable and it seems like they’re growing up before our eyes. Maxwell just graduated from preschool in June and she just started kindergarten. Meanwhile, Ace just celebrated his fourth birthday with a super elaborate Moana-themed birthday party complete with actors to play the Disney characters Moana and Maui, and Jess shared an adorable tribute to her son on Instagram. “May wish [number four] come true my beautiful baby boy,” she wrote.