Round 1 of the Country Mega Bracket has begun, and it's time to put The Groups in head-to-head matchups.

We've got Little Big Town vs. Lady Antebellum, Eli Young Band vs. Zac Brown Band, Dan + Shay vs. Brothers Osborne, and Rascal Flatts vs. Old Dominion. Who do you want to win?

Vote now here or on the main Country Mega Bracket page here for each matchup.

Voting ends at midnight, and the winner will be revealed Thursday, March 7, online and on the air.

Little Big Town vs. Lady Antebellum

Eli Young Band vs. Zac Brown Band

Dan + Shay vs. Brothers Osborne

Rascal Flatts vs. Old Dominion

Vote and follow along for all the results on the main Country Mega Bracket page.

Full Contests Rules Available Here