"Mourir demain" is a 2003 song recorded by the Canadian artist Natasha St-Pier.

It was released on 18 June 2004, as the second single from St-Pier's fourth studio album, L'Instant d'après, on which it features as third track.

This song, which has rock sonorities, achieved a great success in France and Belgium (Wallonia), reaching the top ten.

The song was covered in 2007 by Yannick Noah, Patricia Kaas, Jenifer Bartoli and Jean-Baptiste Maunier.

[6] "Mourir demain" was St-Pier's most successful single in Switzerland in terms of peak position and chart trajectory.