Céline Dion has not only been pregnant of her twins to be born in a month or so but she has also had time to write a song to a popular Canadian singer Marc Dupré, her long time collaborator. Entre deux mondes is already a hit in Canada. This is though not the first time Céline writes for him. Already back in 2005 she wrote for his debut album Tout prés de bonheur . And Marc wrote On s'est aimé à cause for Céline's D'Elles album. And guess what? Céline is Marc's step-mother-in-law. Keep it in the family.