Sara Bareilles singing She Used To Be Mine from Waitress: The Musical (music written by Sara Bareilles)
i couldnt find this clip anywhere else on youtube so i decided to upload it myself
This clip is taken from the live stage capture released in 2023 titled "Waitress: The Musical".
It was filmed over 4 days during the 2021 return of Waitress on Broadway and was both captured with a live audience and without (particularly for close ups).