It looks tragic and I have no idea why she thinks it's some sort of iconic look for her. Ariana made more impact in a year than she did for the whole career so yeah, the SB look was just yet another bad decision.
The lines around her mouth aren't even the main problem to be honest, she's always had those. It's the fact her face is starting to sag really badly, gravity is dragging her pretty hard
Her facial features (eyes, nose, smile) are still all in good shape, it's just she's all bloated on the perimeter of her face now. She needs the hair to hide that or she looks like this