We got Mariah leaving Poppy in WeHo Sunday night and asked her about stealing Meryl's seat at one point during the show ... plopping down next to Steven Spielberg before realizing what she had just done.
Mariah felt terrible about it right after ... apologizing profusely. And it's obvious she still felt bad way after the show ended.
(me) Dear Meryl, please forgive me!!! 🙌🙌 (MERYL STREEP) You can take my seat any time! 😂😂 💖💖💖💖