Though I (the webmaster, John Hayward-Warburton) haven't seen the film, I understand that the most prominent piece of music is the Barcarolle from Contes d'Hoffmann, the “Tales of Hoffmann”, which begins Belle nuit...
Here is a translation of the words:
NICKLAUSSE Lovely night, oh night of love, smile upon our joys! Night much sweeter than the day, oh beautiful night of love! GIULIETTA, NICKLAUSSE Time flies by, and carries away our tender caresses for ever! Time flies far from this happy oasis and does not return. Burning zephyrs, embrace us with your caresses! Burning zephyrs, give us your caresses! Lovely night, oh night of love, smile upon our joys! Night much sweeter than the day, oh beautiful night of love!
Please continue to explore this site (which will be expanded greatly soon), or read more about the film at its official site, “Life is Beautiful”.