One thing to note when watching the show is the gap between when the pilot was shot and when they started the rest of the series. So she is somewhat younger in the first episode than in the second.

I haven't really followed her present musical career. But recently there was a broadcast on the telly of the Bangerz tour from Spain & Portugal with backstage stuff. I was reminded of two things;

Still photography doesn't do little sis Noah justice. She was insanely cute popping out of the bathtub in her kitty-cat get-up to join in on the chorus of a hotel-room rehearsal. Very much a playful girl developing a woman's curves.

And Miley is having too much fun to be having a breakdown. Those who are in meltdown mode take their "distractions" far too seriously. She's busy messin' around doing mashups of furries, lolcats, and other silly sh*t, and having a blast.

No psychological evaluation could prove her stability like the work-ethic-meets-silliness of her tour.

Dante