Swooner Crooner

Swooner Crooner is a 1944 Warner Bros. "Looney Tunes" cartoon directed by Frank Tashlin. The short was released on May 6, 1944, and stars Porky Pig.
The cartoon was nominated for the 1945 Academy Award for Best Short Subject (Cartoons), but lost to the "Tom and Jerry" cartoon "Mouse Trouble".
Plot.
Porky Pig is the supervisor of the Flockheed Eggcraft Factory, where dozens of hens lay eggs for the war effort (in this case, World War II). The hens suddenly get distracted from their egg laying when a handsome rooster (who resembles and sings like Frank Sinatra) is heard singing outside. Frankie's renditions of "It Can't Be Wrong" by Dick Haymes and "As Time Goes By" (from "Casablanca", 1942) causes all the hens to swoon.
When egg production comes to a halt, Porky rushes to investigate and finds all the roosts empty; all the hens have gone to listen to Frankie. Soon, he is auditioning for a crooner of his own to start production up again; showing up are rooster caricatures of Vaughn Monroe ("Shortnin' Bread"), Al Jolson ("September in the Rain"), Jimmy Durante ("Lullaby of Broadway") and Cab Calloway ("Blues in the Night"), none of whom apparently work out.
Porky is on the point of despair when a Bing Crosby rooster (who introduces himself as "The Old Groaner") shows up and provokes a competition with Frankie ("When My Dream Boat Comes Home", "I'll Pray for You", "Trade Winds", "Always in My Heart", "You Must Have Been a Beautiful Baby"). Between the two of them, the overexcited hens' egg production shoots to a level beyond what Porky can handle, including a just-hatched hen chick laying an egg many times her own size.
Surveying literal hills and mountains of eggs all over his farm, Porky is impressed and asks the two roosters, "How did you ever m-m-make 'em lay all those eggs." The roosters demonstrate their technique by crooning at Porky, who lays a mountain of eggs himself as a result.