Last night I dreamed I was playing a wedding where the groom requested a song I don't know

I was set up in a barn, the lights were off except for a single spotlight on me, and the groom kept walking up to the booth and whispering the same song title I'd never heard of. I nodded along like I knew it, but in the dream I started sweating because the whole room was waiting. I woke up with my jaw tight. Probably just the usual anxiety about the 'no song already' feeling, but it felt more like I was being tested on something I couldn't fake.