By the slimmest of margins, Ronnie Dunn's new song 'Let the Cowboy Rock' squeaked by Sugarland's 'Run' last week. Barely a percentage point separated the two songs, but in this "winner take all" system only Dunn will advance to face a new challenger. His latest single is halfway to being enshrined in the Taste of Country Showdown Hall of Fame.

This week's challenger is the newest song from married country duo Thompson Square. 'Glass' features Shawna Thompson on lead vocals for the first time, and her handling of the lyrics is as delicate as the message she's delivering. The song is the fourth single from the band's self-titled album.

So far, Ronnie Dunn has knocked out hits from Gloriana and Sugarland. His new song 'Let the Cowboy Rock' is an example of many of the uptempo, rock-and-roll country songs found on his self-titled album. Listen to both songs and decide which you like better. Vote before Sunday (Feb. 26) at 11:59PM.

Watch Ronnie Dunn's 'Let the Cowboy Rock' Video

Watch Thompson Square's 'Glass' Video

Get the Latest News on Showdown Winners

Enter your email address below to receive the daily Taste of Country newsletter, which will include notification of who moves on to tomorrow's Taste of Country Showdown!

Showdown Rules: The artist and song with the most votes wins, and winner goes on to face next week’s challenger. If an artist wins four weeks in a row, he or she will be retired into the Taste of Country Showdown Hall of Fame to allow for new songs to compete.