They probably changed her to using the ones that you only wear overnight, they work quicker and you don't have them in pics.
They were cute, but everytime they tightened she might have a bit of trouble talking, which is no good when you need to sing regularly.
Yay they're so cute! The pics, she sounds adorable in the concert rip, I didn't realise it was her at first - she sounds kinda different. Very happy sounding <333