As he prepares to take the throne as King of Denmark, scandalous details of Crown Prince Frederik’s wild youth have re-emerged.Before the handsome prince met Tasmanian-born former real estate agent Mary Donaldson in a Sydney bar during the Olympic Games in 2000, he was widely known as the ‘Casanova Crown Prince.’His playboy lifestyle involved fast sports cars, lavish travel around the globe, frequent nightclub visits, and a long list of girlfriends including lingerie models and pop stars.Most weeks, his antics were splashed across newspapers and tabloid magazines in Denmark, where he was labeled a “spoiled brat” who was unlikely to make a stable and settled future king.Concerns were also raised about his lavish spending, with hundreds of thousands of dollars blown each year on his lifestyle.Back then, few in the royal establishment believed Prince Frederik was capable of inheriting the throne – including his concerned parents.Long list of unsuitable partnersFor three years in his early 20s, Prince Frederik dated model Malou Aamund but the Royal Household was said to have forced him to break off the relationship after scandal erupted.On New Year’s Eve in 1992, the couple was traveling in one of the prince’s sports cars when pulled over by police for driving erratically.Aamund, who was behind the wheel, was arrested and charged with driving under the influence.