Beth Leavel performs 'The Lady's Improving' from 'The Prom' musical l GMA Digital 

@eugenio costa no that was her voice

@eugenio costa meryl can actually sing

@eugenio costa movie musicals usually has a pre recorded version for them to lip sync to. However it was her voice pre recorded. Kinda was glad it wasn't recorded like Les Miserables or Cats, so yes it was her "singing". Who knows she may have been singing on set while they filmed

@eugenio costa It was pre recorded, but every time they did a take, Meryl actually sang it even though they didnt use that audio

@eugeniocosta9589it was her voice but she was lip syncing to her own voice

It shouldn’t be “please”, but NOW.