"Tant que c'est toi" (English translation: "As long as it's you") is a pop ballad, recorded in 2003 by Canadian singer Natasha St-Pier, who has spent most of her career in France.
She reproaches her absent lover that he is always late for their rendezvous, and so each time she fears he will never come: Je ne sais jamais si tu vas venir.
The pain of waiting is like travelling a long journey: Peux tu comprendre le chemin que c'est d'attendre?
However, she ends in confident and joyful anticipation of his arrival: Tant que c'est toi, d'aller l'un vers l'autre, peut importe le temps que ça prendra (As long as it's you, going one towards another, the time it will take matters little.)
The song was included in the greatest hits album Tu trouveras... 10 ans de succès (Best of), released in November 2009, where it appeared as the seventh track.