Two of country music's brightest superstars square off in this fan-decided battle between new singles. Hunter Hayes is a two-time champion. His latest song, "21," topped Corey Smith over the long holiday weekend, but today and Tuesday the Hayniacs will take on their toughest competition yet.

Kelsea Ballerini recently became the first female in nearly three years to score a No. 1 hit on Billboard, and now she's back to work. "Dibs" is the second single from "The First Time." It's a sweet, pop-friendly song about chasing after a cute boy. Try listening to it without getting it stuck in your head. It's impossible!

Listen to clips of both Hayes and Ballerini’s songs and vote for your favorite here. You can vote once every hour until this Showdown ends on Wednesday at 8AM ET, so come back and vote often to be sure your artist wins. The winner of this matchup will face a new challenger on Wednesday.

Listen to Hunter Hayes, “21”

Listen to Kelsea Ballerini, “Dibs”

Showdown Rules: The song with the most votes wins, and the winner goes on to face a new challenger in the next Showdown. Vote as much as once per hour online. If a song wins five Showdowns in a row, it will be retired into the Taste of Country Showdown Hall of Fame to allow for new songs to compete. Some songs will be considered for a second Showdown if voter turnout is healthy in a losing effort.