I was going to edit my original post- you guys are good
You can add whichever songs you want as an encore, and your list does NOT have to include the three new songs.
The list is just their top-40 charting songs.
I would say anything that has not been a top-40 hit is good to go on this list, even if it is one they perform already.
But if you want to bend the "rules" a little, go for it!!
