The Bowery Boys invade the world of music and nightclubs when after a tonsillectomy which the hapless Bernard Gorcey paid for leaves Huntz Hall with a radio crooner's voice. Naturally Leo Gorcey and the rest of the boys want to capitalize on this if for no other reasons than to pay poor Bernard Gorcey back. They don't want to lose the ambiance of Louis Dumbrowski's Bowery Sweet Shop as a hangout.
But the elder Gorcey gets in far deeper as song plugger Gabriel Dell and Leo get the Sweet Shop owner to turn his place into a nightclub as a showcase for Hall. That doesn't please Craig Stevens who owns a nightclub across the street with his featured singer Adele Jergens, they don't like the competition. That sets up the crazy antics of this Bowery Boys feature.
A few years earlier Eddie Bracken did a comedy at Paramount where he played his usual schnook character who is discovered to have a velvety singing voice. A guy named Crosby was also under contract to Paramount and they dubbed Bing's singing voice to Bracken's songs.
Monogram couldn't afford Bing Crosby so they grabbed a singer named John Lorenz to dub Huntz Hall. I'm sure Mr. Lorenz was like thousands of others who couldn't get a break because he sounded like Bing Crosby. Still he's effective in Blues Busters.
To waste a Crosby voice on Huntz Hall, the shame of it.