There are many more buds about to open so I can see why it's called show stopper.

Gorgeous!

Looks beautiful. I have to dig through my plant labels and see if I'm growing the same. Mine looks similar and I think this is year three for it, so that might be good news for its longevity. I've killed a few other cultivars and of course that also had me a little wary of the newer forms.

Last spring I divided it into five or six clumps and all did well. I would have had a great show right now but they were run over by a bulldozer and only about half survived, so... I guess it's only somewhat bulldozer-proof ;)

I had no luck with another pink coreopsis but the reliability is why I decided to try it. Mt Cuba is right down the road from me and they have it listed as reliable over a 3 year trial and what I understand is they don't do anything special with soil or watering.

All my threadleafs flop if I don't chop them in early June, and a couple of them get chopped twice each season.

btw I did find the label and it is Show Stopper. It was planted in 2019 so this is the fourth year. No special care other than pulling things away from around it to give a little space. I'd like to find something like this in a pale yellow, like Moonbeam but sturdier with a slightly larger flower.