I knew it was one or the other but I have never really looked it up to confirm.
Today, I decided to see if there were any photos in "Dave's Plant Files" that would end the question. I looked up Celebration Song first and it seems to be a good match. There were many photos that looked like this one.
So then I looked up Pastel Ribbons and there was one photo that also looked a lot like this one!
I really think it is Celebration Song so that will be the fresh label. I should say 'labels'. It turns out that three of my 16 iris are the same cultivar! Maybe I will need to share this one to make room for more varieties....Anyone think they might have room for a pretty little iris to plant next fall?