Jessica Simpson is being slammed over her son's first haircut

Jessica Simpson's youngest son, Ace, is all grown up and has just had his first haircut.

The proud mum took to Instagram to share a picture of his new look last week.

“First haircut ✔️ (Thanks @jessieholiday for making my stud look all grown up 😢) #ACEKNUTE,” Simpson captioned the photo.

But fans were quick to slam the pop star saying the 4-year-old looked like a girl.

"Long hair belongs on girls, not boys," wrote one follower.

"He looks like a girl," another added.

We think he looks super trendy with his adorable shaggy cut!