Rascal Flatts are on a roll. The group cracked a third-straight win yesterday and last night on Taste of Country Nights radio, leaving Mumford & Sons in a trail of country dust. Today, they'll face a new challenger in Staind frontman Aaron Lewis.

Lewis has been spreading his name in country for nearly two years now, and before that, he learned the ropes as a radio-successful rockstar in his own right. His single 'Forever' describes his time as a constant road warrior. Will it be powerful enough to overstep the painstaking vocals of country favorites the Flatts in their latest harmonizer, 'Changed'? That's up to you.

Listen to clips of both Rascal Flatts and Aaron Lewis’ songs and vote for your favorite here. You can vote once every hour online, so come back and vote often to be sure your artist wins. Hear the full versions of the songs tonight after 10PM on Taste of Country Nights. Help your favorite song win by placing additional votes at (888) 678-9995. You can listen to the show online through any of the 41 radio stations that carry it. Voting will end tonight at 10:40PM CT.

Listen to a Sample of Rascal Flatts, 'Changed'

Listen to a Sample of Aaron Lewis, 'Forever'

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, and again by calling (888) 678-9995. If a song wins five days 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.