Last night, Billy Dean fans were behind one of the biggest Showdown upsets of all time. The singer's new song 'I Can't Leave a Good Thing' took down '1994' by Jason Aldean on the strength of phone votes at Taste of Country Nights radio. Can Dean knock off another superstar -- make that three superstars -- on Friday night ?

Tim McGraw's collaboration with Taylor Swift and Keith Urban is the song from 'Two Lanes of Freedom' that everyone is talking about. Urban adds heavy riffs from his Telecaster, while Swift provides much more than backing vocals. Early fan support has already spawned multiple covers.

Listen to clips of both Dean and McGraw's 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 Billy Dean, 'I Can't Leave a Good Thing'

Listen to a Sample of Tim McGraw, 'Highway Don't Care'

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.

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