"Underneath It All" is a song by American ska band No Doubt, released in July 2002 as the third single from their fourth studio album Rock Steady (2001).

Written by the band's lead singer Gwen Stefani and David Stewart, the song features a reggae production from Sly and Robbie and guest vocals from Lady Saw.

During a visit to her then-boyfriend Gavin Rossdale in London, Gwen Stefani and David Stewart used backward string samples to write the song in only ten minutes.

[4] A love song composed in the key of E major, the track is written in common time and moves slowly at 69 beats per minute.

[6][8] An alternative version of "Underneath It All" with a more pop-centric structure was released to pop radio stations, omitting Lady Saw's contribution.

[11] LAUNCHcast agreed the beat was one "that Sly & Robbie can do in their sleep" but added that the song "keeps its modern edge thanks to Lady Saw's cooling rap.

"[12] Kitty Empire writing in NME also gave Lady Saw's toast a positive review, stating that it "does an excellent job of sexing up all the sugar.

[15] In its review of The Singles 1992-2003, OMH Media described the song as "an embarrassingly self-conscious reggae pastiche, unimproved by a guest rap from Jamaican dancehall queen Lady Saw.

After a scene with her in front of a white heart with roses, bassist Tony Kanal and drummer Adrian Young play basketball while Stefani stands against the wall.

The bicycling scene was to originally show footage that the band shot while recording in Jamaica since Stefani wanted to include a Jamaican theme.