all dresed up with no place to go

While I was cleaning the house this morning I could hear Katey constantly telling Jack to, "hold still, I'm almost done." Then they came down stairs after a few minutes of that and this it was I saw...I asked Jack where he was going all dressed up and he said,"Mooom, um, nowhere!" Katey yells over him,"to a wedding, I'm a genius!". Where do you think he's going?