She had some vocal issues when she broke up with Ryan and recorded ?Do better? and the song with Jessie J. Still sang her butt off but she had to fight through hoarseness and some issues.
She saw a vocal doctor in 2014 and 2015 before doing Chicago and recording that song with the Walls group ?God On my mind? and there was a HUGE difference. she praised her NYC doctor heavily
And obviously with beggin and pleading she SLAYED but she stepped outside of her comfort zone just a bit. And the song with Sir the Baptist ... although i remember her complaining that her voice was not in good shape the same day she recorded it, so meh.
She sounds super youthful and is singing really higher lately and i love it.