Oh, Sam Smith, you amateur. Don't you know when you call in sick you're supposed to keep a low profile? This rookie made quite the mistake.
He tweeted the following in regards to greeting fans after his show:
That would've been all well and fine if videos of Smith and his backup singers singing Beyonce karaoke hadn't emerged at 3 am with the caption:
"Best night EVER at a karaoke bar in Nashville!!!!!!!!!"
Various onlookers posted evidence to Instagram:
And some more: