Stock photo: Derrick Knight | A total of 22 groups will duke it out across two venues in prelims, and seven will advance to the championship finals.

Des Moines heavyweights face off at Johnston, a Midwest mix of choirs collides at Milton, and Nebraska fields two good lineups at Gretna East and Millard West.

PHOTO: @shotbytalon | Two local Des Moines-area groups will take their fight to be the best to Johnston this weekend.

From Anamosa to Ankeny to Davenport, plenty of groups showed up and showed out in one of Iowa's biggest weekends of the year.

Linn-Mar remains undefeated while Waukee Northwest and Urbandale stay within the top three.

Three of the nation’s top groups held firm atop the standings and defended their territory, while four out-of-state groups partied in Wisco.

The lineups are deep this weekend, both in quantity and quality. From Wisconsin to Missouri to Iowa to Nebraska, the action will be tight.

Linn-Mar, Waukee Northwest and Urbandale will do battle in an early-season mid-Iowa titan battle.