Lara Fabian has no trouble singing in Italian cause her mom is Italian... however she mostly lives in Québec like Céline Dion and contrary to Céline she speaks french without accent. Then she speaks 5 others languages including english and russian.
She has a beautiful voice way above that of Céline... trust me, you can't even compare.
She sings "Caruso" an Italian song... that I like a lot, my wife being Italian...