Fun thread! 
I also think of Walking In the Air and Ave Maria. Still thinking ...
I decided to update the poll adding those two. I knew them but put them as other but you know what they are signatures as well so.
I got the idea from going grocery shopping at the supermarket and just was into Chloe that I listened to each of her solo's and thought how significant her voice is an intregal part to and the success of Celtic Woman.🥰