Europe's tiaras were out in full force as Sweden’s royal family celebrated King Carl Gustaf XVI’s 80th birthday on Thursday, April 30—even if the country’s future queen isn’t old enough to wear one just yet. Crown Princess Victoria and Prince Daniel’s 14-year-old daughter, Princess Estelle , might have been tiara-less, but she looked elegant in a lavender gown as she joined her family and royals from around the world at the Royal Palace in Stockholm. Estelle, who is heir to the throne after her mother, wore a bespoke Christer Lindarw dress for the occasion featuring a short-sleeved, beaded overlay and a floor-length purple skirt. One day, she’ll get to wear a tiara of her own like mom Crown Princess Victoria, who wore the dazzling diamond Connaught Tiara for the banquet. For now, Estelle sported a pair of diamond stud earrings with pink gemstone accents. Princess Estelle joined her parents for King Carl Gustaf's 80th birthday party.…