She looks so shiny! You two look like you had a great time. :]
As far as her prancing in place, try circling her, then asking for halt again. If she tries to prance/sidestep/back up, immediately circle her again.
Daisy does that to me constantly. She just needs to be reminded that I'm boss.
Another thing that works is making "her way" -- your way. If she backs up, ask her to back up, and keep backing her until you ask her to stop. If she tries to sidestep, make her side pass until you ask her to stop. If she prances, make her trot tight circles until you ask her to stop. And so on.
Anyway, great pics, you two are CUTE!