At 68, Madonna is in full bloom. The Queen of Pop rang in her latest birthday with an island celebration in Corfu, Greece — and an extravagant floral Dolce & Gabbana gown. The Baroque piece was shown on the runway just last month at the brand’s Alta Moda Taormina show, sparkling with head-to-toe sequins and embellished with crystal and satin flowers. An arrangement of lush faux fuchsia roses perched on a headpiece to crown the look. The singer accessorized with glittering gold pumps and stacked Dinosaur Designs brass bangles. Around her neck, she wore a floral necklace set with tanzanite, morganite, aquamarine, rhodolite garnet and a South…