COPENHAGEN, DENMARK - MAY 27: Crown Prince Frederik of Denmark and Crown Princess Mary together with their four children - (L-R) Princess Josephine, Princess Isabella, Prince Vincent, Prince Christian - during arrival to the live broadcast of the TV show 'All of Denmark celebrates The Crown Price' on the occasion of the 50th birthday of The Crown Prince Frederik of Denmark at Royal Arena on May 27, 2018 in Copenhagen, Denmark. Some 12,000 people attended the show where the bands and music were selected from the Crown Prince's recent public playlist on Spotify and consisted of Danish and international rock, pop and beat like the Rolling Stones, The Beatles and Michael Jacson. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)
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Corbis Entertainment Ole Jensen

COPENHAGEN, DENMARK - MAY 27: Crown Prince Frederik of Denmark and Crown Princess Mary together with their four children - (L-R) Princess Josephine,, Prince Vincent, Princess Isabella, Prince Christian - pose during arrival to the live broadcast of the TV show 'All of Denmark celebrates The Crown Price' on the occasion of the 50th birthday of The Crown Prince Frederik of Denmark at Royal Arena on May 27, 2018 in Copenhagen, Denmark. Some 12,000 people attended the show where the bands and music were selected from the Crown Prince's recent public playlist on Spotify and consisted of Danish and international rock, pop and beat like the Rolling Stones, The Beatles and Michael Jacson. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)
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Corbis Entertainment Ole Jensen

COPENHAGEN, DENMARK - MAY 27: Crown Prince Frederik of Denmark and Crown Princess Mary together with their four children - (L-R) Princess Josephine, Princess Isabella, Prince Vincent, Prince Christian - during arrival to the live broadcast of the TV show 'All of Denmark celebrates The Crown Price' on the occasion of the 50th birthday of The Crown Prince Frederik of Denmark at Royal Arena on May 27, 2018 in Copenhagen, Denmark. Some 12,000 people attended the show where the bands and music were selected from the Crown Prince's recent public playlist on Spotify and consisted of Danish and international rock, pop and beat like the Rolling Stones, The Beatles and Michael Jacson. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)
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Corbis Entertainment Ole Jensen

COPENHAGEN, DENMARK - MAY 27: The Crown prince couples four children - (L-R) - Prince Vincent, prince Christian, Princess Josephine, Princess Isabella - during arrival to the live broadcast of the TV show 'All of Denmark celebrates The Crown Price' on the occasion of the 50th birthday of The Crown Prince Frederik of Denmark at Royal Arena on May 27, 2018 in Copenhagen, Denmark. Some 12,000 people attended the show where the bands and music were selected from the Crown Prince's recent public playlist on Spotify and consisted of Danish and international rock, pop and beat like the Rolling Stones, The Beatles and Michael Jacson. (Photo by Ole Jensen - Corbis/Corbis via Getty Images)
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Corbis Entertainment Ole Jensen