"Stacy's Mom" is a song by American rock band Fountains of Wayne. It is the third track on their third studio album, Welcome Interstate Managers, and was released to radio as the album's first single on May 19, 2003, through S-Curve Records and Virgin Records. "Stacy's Mom" was written by bassist Adam Schlesinger and vocalist Chris Collingwood, both of whom produced the song alongside Mike Denneen. Its subject matter was inspired by a friend of Schlesinger's when he was young who was attracted to Schlesinger's grandmother. It is a power pop song with which the group hoped to emulate the sound of American rock band the Cars.

Fountains of Wayne was an American rock band that formed in New York City in 1995. The band included founding members Chris Collingwood, Adam Schlesinger, Jody Porter, and Brian Young. They released six albums from 1996 to 2011 before effectively disbanding in 2013. They are best known for the Grammy-nominated song "Stacy's Mom".