Like if your LO wears a dressy outfit to a wedding as a guest...do they always wear dressy shoes? Or just their regular play shoes?

We are bringing our kids to a wedding next Sunday and I am looking for shoes for LO 2 who is 16 months old. She wears a narrow 1.5 or size 2 and that is hard to find. DH thinks I'm being stupid and LO 2 should just wear her everyday shoes that she wears to daycare or just go barefoot/wear tights.