But now it's straight up cancelled!
Ticket holders were sent the following email on Friday:
[Image via Fayesvision/WENN.]
When MiMi has a song in her heart, she's gotta share it with the
world Carlyle hotel dining crowd!!
"Mariah was loving the music, and the band invited her to join in."
MiMi posted a pic of herself with the band (above), along with the caption:
"During an impromptu visit to the Carlyle, singing Jazz standards I've loved since childhood."
Mariah lent her legendary vocals to classics Summertime and Lullaby of Birdland.
[Image via Twitter.]