For her wedding day?
It's a half up bun, done with a donut then plaited down the length iyswim?
I've tried it on hair that hasn't been washed for a few days & it slides out & looks scraggy by the time we get to school 
Or any tips for making it stay put just long enough for the (church, so maybe longish) ceremony & a couple of snaps afterwards?
tia 