i keep seeing gum paste tiaras ... I have satin buttercream fondant can I use that instead? Tia!

I really don't think it'll hold or dry hard enough. I just made one about a month ago using half fondant and half gumpaste which worked very well. It needs to dry for a week or two though regardless of what you use to be on the safe side.

Oh Man! I watched a video and it said to let it dry for two days!

It could be where I live...lots of humidity. Mine took at least a week but then again it was half fondant and half gumpaste. Gumpaste dries much faster than fondant so if I used all gumpaste, it might have only taken a few days. However you must work really fast with gumpaste bc yes it starts hardening super quick.

OH Ok thank you