"Undercover Lover" is a song by Welsh rock band Kids In Glass Houses, serving as the third single from their second album, Dirt.

The single features The Saturdays singer Frankie Sandford and was released as a digital download on 13 June 2010 with the CD single released the following day.

The song features The Saturdays singer Frankie Sandford.

The track is about two people (Frankie Sandford and Aled Phillips in the music video) are secretly in love with one another, but do not want to show it.

After receiving strong radio airplay throughout May 2010, "Undercover Lover" debuted on the UK Singles Chart at number 161 on 30 May 2010 before climbing to number 119 on its second week on the chart.