Dannii Minogue shared an adorable 58th birthday post for her big sister Kylie Minogue 💕 "Get dressed up and pop bubbles, because today it is time for birthday cake and flowers for the birthday girl 🎂🍾🥂" the singer and media personality, 54, wrote. "Happy Birthday Kylie 🌸 Another incredible year watching you grow and bloom" 📽️ : #DanniiMinogue #KylieMinogue #Birthday