IN AN ATTEMPT TO GET ENOUGH MONEY TO PAY FOR ISABELLA'S MEDICAL BILLS AFTER SHE GOT COVID, PHINEAS AND FERB DECIDE TO BECOME MUSICIANS, HOWEVER THEY PLAY THE WORST SONG IN THE WORLD (FRIDAY BY REBECCA BLACK) INSTEAD OF THE BEST SONG IN THE WORLD (TRIBUTE BY TENACIOUS D). THEY ARE THEN FIRED.
