Sue Teegarden of Chaffee, Mo., a longtime fan of Dumey's productions, saw the show in July.
"I was just floored by it," she said. "We talked about it all the way home. We don't have to travel to St. Louis to see exceptional talent again."
An evening showcase of "Sing, America, Sing!" will be performed at the Plaza Conference Center on Aug. 17, 18, 24 and 25. The show includes dinner, with catering by Port Cape Girardeau.
Dumey describes the show as a fast-paced salute to the spectrum of music that is uniquely American, including swingin' sounds from the big band era, golden oldies from early rock 'n' roll, famous melodies from Broadway and the Nashville, Tenn., sounds of country-western.
"Our show is much like Missouri weather," Dumey said, "If you don't like it, wait 15 minutes. It's going to change."
The show was "a rare treat," said Mike Slinkard of Cape Girardeau. "One of the greatest, clean entertaining evenings I've had in a long time. I can't wait to see it again."
Slinkard said he will see the show again in August.
The performers, all in their teens, enjoyed the show as much as the audience.
"The energy from the audience was incredible," said one performer, Carson Kelley, 19. "The more they gave, the more we wanted to give back. Their reactions made the hard work worthwhile."
The performers practiced for all of June for the July performance and will now get to use that work in an impromptu August show.
But singer Brodrick Twiggs, 14, is looking beyond August. "I would love to be traveling -- form a tour company where we could show the nation what we've got."
According to Dumey, Southeast Missouri has a wealth of talent to show the nation.
"The talent in this area could serve as a valuable resource for the region," he said. "A place to showcase our young talent could also serve as a powerful magnet for tourism in our area. It could be a win-win for everyone."
Dumey is hoping he can find civic leaders with the same vision to make "Sing, America, Sing!" a regular occurrence.