“Concave Layers” Are Going Viral On TikTok… by salonwithoutwalls | Mar 27, 2023 | Beauty… RF29: We thought we’d left the big, bouncy blow-dry in the ’90s, but the look has made a comeback lately — and it’s all thanks to TikTok. The trend started with none other than Cindy Crawford, and even now, the ’90s supermodel is still...