"Quand je t'aime" () is a 1987 song in French by Greek singer Demis Roussos. Written by Didier Barbelivien with music composed by Pascal Auriat, it was released as a single in December 1987 and was part of Roussos' 1988 studio album Le Grec. It had success in France, becoming a top-three hit.
"Quand je t'aime" entered the French chart at number 48 on 16 January 1988, reached a peak of number three in its 16th week, and spent a total of 27 weeks on the chart, 16 of them in the top ten. It achieved Silver status, awarded by the Syndicat National de l'ÃÂdition Phonographique. On the European Hot 100 Singles, it started at number 99 on 20 February 1988, peaked at number seven in its 13th week, and fell off the chart after 24 weeks of presence.