"Je ne sais pas pourquoi" (English: "I Don't Know Why"), also known as "I Still Love You (Je ne sais pas pourquoi)" in Australia, the US, Canada and New Zealand, is a song by Australian recording artist and songwriter Kylie Minogue from her debut studio album Kylie (1988). Released as a single on 10 October 1988 by PWL, the song has subsequently appeared on most of Minogue's hits compilations including Greatest Hits and Ultimate Kylie. Like most of Minogue's material between 1988 and 1992, it was written and produced by .

The song, with its French inspired title and accompanying video, was released as the fourth single in October 1988, and was taken from the debut studio album Kylie. It was written and produced by , who produced Minogue's first four studio albums. The title of the song varied in different parts of the world. In Australia, the US, Canada and New Zealand it was retitled "I Still Love You" followed by the original French title in brackets. In some parts of Europe, there was a further variation, "Je ne sais pas pourquoi (I Still Love You)" but although the 7" single had different titles depending on the territory of release, the song itself is the same.

"Je ne sais pas pourquoi" is a pop ballad song, which is also inspired by minor teen-pop and dance-pop styles, which features instrumentals including drum machine, synthesizers and some minor guitar riffs. A substantially different early demo version of "Je ne sais pas pourquoi" is known to exist, although it has never been officially released. This version is said to have a completely different intro and is of a slightly faster tempo and has a stronger beat. Commercially, the song received good chart success, peaking in the top ten in countries including Finland (where it peaked at number one), Ireland, New Zealand and the United Kingdom, while peaking in the top twenty in countries like Australia, France, Germany and Norway.

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