"One Thing" is a song by Canadian rock band Finger Eleven, released on September 8, 2003, as the second single from their self-titled third album (2003).

The band had thought their single "Stay in Shadow" would become a popular hit, but strong success fell on "One Thing" instead, although the track didn't find wide mainstream attention until several months after its 2003 release.

"One Thing" reached number five on the US Billboard Modern Rock Tracks chart and stayed there for 26 weeks.

A massive hourglass is seen on the checkered floor as well as band members perched on tall stands and leafless trees.

Other imagery includes a crow, a woman standing over thousands of candles along a building floor, a symphony orchestra conductor conducting an empty orchestra, and a musical box with a spinning, lifelike ballerina.