Victoria and Brooklyn gave other shoppers something of a surprise when they wandered into the Claire's in the Westfield shopping centre in Shepherd's Bush.
Well, Victoria reportedly walked through the store front with Romeo, while Brooklyn entered through a back entrance with dad David.
Speaking to The Sun, store manager Joe Parker said, "They didn't ask us to close. A few customers noticed, but things stayed calm. I think they were in disbelief."
Victoria used her fashion sense to help Brooklyn choose which stud to have as his first earring.
Joe added, "They picked the most expensive earring - but Victoria told him to go a size down so it wasn't too blingy.
"Brooklyn was cool but I was so nervous, I was like, 'I can't mess this up'."
The family left by the back door after half an hour. "I couldn't believe what I had experienced," said Joe.
"They were a lovely family."
Victoria apparently also treated herself to some £20 hair extensions and paid £45 Brooklyn's earring and piercing.
Meanwhile, it's recently been reported that Brooklyn is an aspiring model, and has inherited his mum's love for fashion. He recently starred in a shoot for Man About Town magazine as well as New York Times' T mag.
Love Victoria's style? Our fashion evolution gallery is just for you: