The girl had a huge grin on her face as she was filmed by her mum opening the gender reveal parcel.
But as she looked in the paper bag and pulled out a cupcake with blue icing, things went down hill.
"Oh, it's a boy," she said quietly. "Is it really a boy?"
When her mum confirmed that she was expecting a baby boy, the girl wasted no time showing exactly how she felt.
Luckily her mum saw the funny side.
"Well, you better get used to it," she said.