“Fun, Fun, Fun” is a song written by Brian Wilson and Mike Love for American rock band the Beach Boys. It was released in 1964 as a single backed with “Why Do Fools Fall in Love”, both later appearing on the band's album Shut Down Volume 2.

“Fun, Fun, Fun” is one of the Beach Boys' many songs that defined the California myth. Its lyrics are about a teenage girl who deceives her father so she can go hot-rodding with his Ford Thunderbird. At the end, her father discovers her deception and takes the keys from her. Near the end of the song, the song's narrator suggests that the girl accompanies him, so that they may have “Fun, Fun, Fun” engaging in other activities.