Schumer's best friend and fellow comedian Rachel Feinstein learned this lesson herself this morning, according to a text exchange the Trainwreck star shared on Instagram.
"Want to hang at cellar later? I'll be there at 8:15," Feinstein texted, referring to New York City's Comedy Cellar.
Schumer's response is deadpan: "I have plans tonight."
(She hashtagged her Instagram post, #myfriendssupporme.)
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But it was all a misunderstanding, Feinstein jokingly responded on Twitter, pinning the blame on comedian Keith Robinson for stealing her phone.
"I'm so sorry!I swear I remembered but @1keithrobinson took my phone! #toxicperson #Old" Feinstein tweeted.
Robinson has yet to respond.
Either way, hopefully Schumer's pal will be tuning in on Sunday night to see if the comedian will take home the Golden Globe for best actress in a motion picture, comedy or musical. Schumer will have friends at the award show, however, as she will be facing off for the award against pal Jennifer Lawrence.
The Golden Globes presenter will also have a busy night juggling two dates to the Globes. Sister and bff Kim Caramele will be her official Globes date, but Schumer also confirmed new boyfriend Ben Hanisch will join her at some point during the night. (Her new beau also shared a fun shot of the pair on Instagram Sunday, captioning the shot "So excited for this talented woman tonight!"
Earlier Sunday, Schumer jokingly shared an image of her and Caramele looking ready to attend an event seemingly to be held at the Barbie Dream House.
"How do we look? #roadmanager" she captioned the faux-serious shot.
A short time later, she also shared a shot of a truly epic-looking breakfast, captioning the image "Hollywood is hard."