Loooong afternoon and earworms

Ninety minutes until I can leave for chorus tech rehearsal. Can I go now? I've been practicing the music so much this week that I can't get it to stop playing my head: Forty voices singing "Ex audi! Ex audi!" in four-part harmony. (No—we're not singing the praises of a car!) Then "Freedom...is something that the world...can never take away...from you!" Then "Big dykes with small dogs..."

Make it stop!