The song everyone knew but me

Last night I dreamed I'm DJing a wedding where the bride and groom keep requesting a song I've never heard. Every time I ask them to hum it, the whole room goes quiet and starts swaying to something I can't hear. I spent the whole night hunting for it, and I woke up feeling like I'd let everyone down — which is exactly how I feel after a bad gig, so maybe my brain just processes stress through weddings now.