"The One" is a song written by Karen Manno and Billy Lee and recorded by American country music singer Gary Allan. It was released in January 2002 as the second single from album's 2001 album Alright Guy. The song reached number 3 on the U.S. Billboard Hot Country Singles & Tracks chart. It also entered the Top 40 on the Billboard Hot 100, making this Allan's first Top 40 hit on that chart.