The Cat Above and the Mouse Below

Tom, billed as the famous baritone 'Signor Thomasino Catti-Cazzaza,' takes the stage at a concert hall to perform 'Largo al factotum' from Rossini's opera Il Barbiere di Siviglia, delighting the audience above. Jerry, meanwhile, is trying to sleep in his home beneath the stage and is repeatedly jolted awake by Tom's booming voice and foot-stomping. Jerry attempts to silence Tom by reaching up with a toothbrush to tickle his feet, but Tom retaliates by stomping so hard that he destroys Jerry's bed. The conflict escalates into a series of mutual sabotage pranks: Jerry holds up a provocative sign that lures Tom to stick his head through a stage vent, whereupon Jerry snaps his lips shut with a rubber band; Tom shoots a staple downward, pinning Jerry to the wall; Jerry licks a lemon slice directly in Tom's line of sight to ruin his singing, then drills holes through the stage floor near Tom's feet; and Jerry aims a plunger up at Tom's mouth during a sustained operatic note. At the performance's climax, Jerry inadvertently drops a sandbag on Tom, sending him crashing through the stage floor. With Tom now trapped below with a comically flattened head, Jerry dons a tuxedo, climbs onstage, and takes over the finale, singing the closing passage himself in a high-pitched voice. Despite Tom's desperate attempts to disrupt him from below, Jerry completes the performance gracefully and takes a bow to enthusiastic audience applause as the curtain falls.

Sources: Wikipedia, TMDb overview