In 2002, Sony BMG decided to publish the singer's first best of, Rien ne s'arrête, which achieved a good success.

At the same time, Kaas started her acting career in Claude Lelouch's film And Now... Ladies and Gentlemen, with Jeremy Irons.

Piano Bar was the sixth album of the singer, but the first one published that was sung mainly in English, and is a tribute to the great French chanson artists of history.

There are also a cover version of Yves Montand's song "Les Feuilles mortes", and another of Gilbert Bécaud, "Et Maintenant", under the title "What Now My Love".

[1] In France, the album had a moderate success, It started at #14 on April 14, 2002, then reached #10 in its second and sixth week, but was unable to climb higher.