Today’s strip might not quite be at the “Somehow Palpatine returned”-level, but “Luckily, one of the residents at Bedside Manor overheard that the band was playing here at St. Spires” is certainly on the list of history’s worst narrative solutions via exposition.
I think Funky and Holly must have gotten turned around driving on those snowy roads. Judging by the looks of this lady waving sheet music at them, I’d say they shot clear past Centerville, through a multiverse portal, and straight into Whoville. Specifically, the Whoville from the live-action Grinch movie. Fitting for this strip, I suppose.