It's day-three of The Boot's sneak preview of Rascal Flatts' upcoming album, 'Unstoppable.' Every day for the week leading up to the CD's April 7 release, we're bringing you new songs early, with exclusive audio commentary from Gary, Jay and Joe Don. On Tuesday, we kicked it off with four tracks: 'Love Who You Love,' 'Forever,' 'Things That Matter' and 'Here Comes Goodbye.' (Listen to those four songs here.) Wednesday, we brought you the premiere of 'Once,' a love song written by Jeffrey Steele and 'American Idol' judge Kara DioGuardi. (Listen to it here.) Today we bring you 'Why,' a gorgeous ballad that highlights the strength of Gary's voice. Listen below.

Listen to 'Why'