"Bathwater" is a ska punk song written by Tom Dumont, Tony Kanal, and Gwen Stefani for No Doubt's fourth studio album Return of Saturn (2000).

The song was written in only ten minutes, opening with slow New Orleans funeral brass and Adrian Young as a human beat-box.

Entertainment Weekly described the song's cabaret style as campy and noted that "even lovelorn teen girls may... think it's pretty yucky.

"[4] Rolling Stone described it as a combination of 2 Tone and the slapstick of farces by Gilbert and Sullivan that "never drops the band's signature blend of adrenaline and sugar.

"[5] In its review of The Singles 1992-2003, musicOMH disagreed and referred to it as an "uncomfortable merging" of 1940s dance music and the work of 2 Tone band Madness.

On American Idol (season 6), Sanjaya Malakar performed "Bathwater", the week that Gwen Stefani was the mentor for the contestants.