Wow, what a run for Kree Harrison. The former American Idol contestant has been laying low for a few years, but she's back in a big way with her new single, "This Old Thing," which will move on to the final round in competing for the Hall of Fame. She's posted some major wains recently, but she'll be facing a huge challenge as she squares off against the new song from Maddie & Tae.

"This Old Thing" is the lead single from Harrison's debut album, and it's as different from most of what's at country radio right now as it could possibly be, in a good way. The track has a bit of a throwback vibe, with horns and a soulful vocal performance from Harrison. Her fans have been turning out to vote for it in droves, giving her four Showdown wins in a row. She's shooting for the Hall of Fame today and over the weekend.

Maddie & Tae's new single is "Sierra," and it's a song about an actual bullying experience Maddie Marlow went through in school. The lyric doesn't hold back on the details, and it's a very relevant song from an artist that has had a lot of success at country radio in recent years. Can they break Harrison's streak, or is she Hall of Fame bound?

Listen to clips of both Harrison and M&T’s songs and vote for your favorite here. You can vote once every hour until this Showdown ends on Monday 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 Monday.

Listen to Kree Harrison, “This Old Thing”

Listen to Maddie & Tae, "Sierra"

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.