"In Too Deep" is a song written by Rick Nowels and produced by Andrew Farriss for Jenny Morris's fourth studio album Salvation Jane (1995). It was released as the album's fourth single but was not successful, peaking at number 143 on the Australian ARIA Singles Chart.
American singer Belinda Carlisle covered "In Too Deep" for her sixth studio album, A Woman & a Man (1996). Her version, produced by David Tickle, charted at number six in the United Kingdom, number 10 in Hungary, and number 11 in Australia; in the latter country, the song is certified gold by the Australian Recording Industry Association (ARIA).
British magazine Music Week rated the song three out of five, adding, "Same formula and very likely the same success for Carlisle. Radio is already picking up on this Rick Nowels-penned track."
The accompanying music video was directed by David Nelson. It shows Belinda in Italy, dancing in the fountain, and a man in the bathroom, presumably her ex-boyfriend. It shows her and the man at the pool, with Belinda wearing a blue jacket at one scene. At the end of the music video, she and the man kisses as the crowd of spectators watch.