Michael Bublé is celebrating his youngest daughter's fourth birthday 🥰 "My Cielo ❤️ When it comes to you, I never stood a chance!" wrote the Canadian singing legend, 50, who shares four children with wife Luisana Lopilato. "I pray you always know how completely and endlessly we love you. Watching you become this funny, fierce, beautiful little person is one of the greatest privileges of my life." 📽️ : #michaelbuble #birthday