"Stupid" is a song written by Sarah McLachlan and produced by Pierre Marchand for McLachlan's eighth album Afterglow (2003). It was released as the album's second single in Australia and the United States in mid-2004.
The music video features McLachlan in different time periods and was directed by Sophie Muller.
The song became McLachlan's highest-charting single release in Australia, debuting at number thirty-seven in early June 2004. It spent seven weeks on the Australian ARIA Singles Chart, two of which were in the top fifty.
A remix of the song, titled "The Mark Bell Mix" was featured on So You Think You Can Dance.