Want to try the look at home? Hair can get big — like closer-to-god big — when you use a crimping iron on the entire ponytail. If you're into that, go for it, but if you want to keep the look a bit more tame, like Grande, just work with a select few sections. And remember: The more tension you use when clamping down the iron, the sharper the crimp, so start with a light hand and then build up if you want more. Finally, try some styling tricks, like braiding crimped hair , for a more modern feel. Not that we expect to see that look on Grande anytime soon — that is, unless the braid is pulled into a ponytail first.