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Chicago
 | THUMMp
Once upon a time, one of the greatest acappella groups in the Midwest was a buzz in the ears of Milford, MI. From 1998 - 2010, elmoTHUMM wowed audiences with their aggressive sound, rich arrangements, and boundless energy. They won countless contests, accepted awards, played for Presidents and royalty, filled TV screens, and worked their way into the hearts of kids and parents throughout the country. Now THUMMp, they look forward to bringing Chicago more great music as only THUMMp can. Members: Greg Vaden, Jason Miller, Ed Pendleton, Tre Cruz   |
 | 4O6
4O6--pronounced four-oh-six--is the competitive sub-group of Bradley University's Dynamix A Cappella club. They are a co-ed, student-run group that performs throughout their home campus and the greater Peoria area, singing a variety of genres including pop, rock, jazz, and a cappella classics. Their 11 members range from music majors to first-time performers. This will be their first time competing in an a cappella competition, as their group was just recently formed last year, though you might recognize them from their guest performance at the 2025 Harmony Sweepstakes competition. 4O6 is thrilled to be back, and they wish all the competing groups the best of luck. Members: Mars Heath, Grace Leonard, Olivia Williams, Kaitlyn Bell, Audrey Drake, Diamanda Vavilis, Shelcy Altis, Bruce Smolucha, Christopher Leatherwood, Casper Chhe, Sean Crawford |
 | Linc 182
Linc 182 is a new and exciting acapella ensemble, mostly versed in the barbershop style of singing. They recently won the 2023 Illinois District State Barbershop Quartet Contest and qualified/competed at the 2024 International Quartet Contest. Although fairly new, this quartet is full of experienced musicians, well at least 3/4 full. The older members of the quartet have won multiple Illinois District quartet championships, competed Internationally, as well as won chorus championships with the award winning Sound of Illinois Chorus, located in Bloomington, Normal. The Linc part of the quartet is 14 year old tenor, Lincoln Beutel, who is the son of the baritone, Tim Beutel. We hope you enjoy the rich harmonies and spritely energy of Linc 182! Members:  |
 | Outbound A Cappella
Outbound A Cappella is a contemporary a cappella group based out of the Chicago suburbs. Founded in 2023, they are known to perform a diverse set of music, spanning various genres and decades. Members: Megan Ryan, Sabra Gerber, Ilana Bley, Marissa Buchan, Kendall Bregenzer, Courtney Tedesco, Anish Parikh, Jake Scheuring, Michael Severino, Scott Spector, Dan Kassel |
 | The Peppermint Patties
The Peppermint Patties is a Chicago-based vocal group founded in 2018 by Anna Caldwell, Laura Emery, and Daina Fischer, with Nikki Krzebiot joining in 2023. The group specializes in close-harmony jazz and musical theater, with a dash of pop and classical music. All of the Patties are professionally trained musicians with degrees in vocal performance and music education. They perform across Chicagoland and the Midwest as both a trio and a quartet, appearing at private events and headlining shows at venues such as Venus Cabaret and Hey Nonny. In 2025, The Peppermint Patties won third place at the Chicago Harmony Sweepstakes A Cappella Festival. Members: Anna Caldwell, Daina Fischer, Nikki Krzebiot |
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