It's the Paris Life (1954)

In 1906, Viscount Paul de Barfleur fell in love with Cri-Cri delagrange, a singer at the cabaret "La vie parisienne". But the young man's father separated the lovers, who then married, each on his own... Forty-seven years later, in 1953, Cri-Cri and Paul's respective granddaughter and grandson meet by chance and fall in love with each other. The girl's father disapproves of the affair and is about to put an end to it. But the old Vicomte de Barfleur, who has never been consoled by not marrying Cri-Cri, intervenes in time to save the couple's happiness.