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BORGHOLM, SWEDEN - JULY 15: Crown Princess Victoria of Sweden, Princess Estelle of Sweden and Prince Oscar of Sweden are seen meeting the people gathered in front of Solliden Palace to celebrate the 40th birthday of Crown Princess Victoria of Sweden on July 15, 2017 in Borgholm, Sweden. (Photo by Andreas Rentz/Getty Images)

BORGHOLM, SWEDEN - JULY 15:  Crown Princess Victoria of Sweden, Princess Estelle of Sweden and Prince Oscar of Sweden are seen meeting the people gathered in front of Solliden Palace to celebrate the 40th birthday of Crown Princess Victoria of Sweden on July 15, 2017 in Borgholm, Sweden.  (Photo by Andreas Rentz/Getty Images)

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BORGHOLM, SWEDEN - JULY 15: Crown Princess Victoria of Sweden, Prince Daniel of Sweden, Princess Estelle of Sweden and Prince Oscar of Sweden is seen meeting the people gathered in front of Solliden Palace to celebrate the 40th birthday of Crown Princess Victoria of Sweden on July 15, 2017 in Borgholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)

BORGHOLM, SWEDEN - JULY 15: Crown Princess Victoria of Sweden, Prince Daniel of Sweden, Princess Estelle of Sweden and Prince Oscar of Sweden is seen meeting the people gathered in front of Solliden Palace to celebrate the 40th birthday of Crown Princess Victoria of Sweden on July 15, 2017 in Borgholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)

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BORGHOLM, SWEDEN - JULY 15: Prince Daniel of Sweden, Crown Princess Victoria of Sweden, Princess Estelle and Prince Oscar of Sweden is seen meeting the people gathered in front of Solliden Palace to celebrate the 40th birthday of Crown Princess Victoria of Sweden on July 15, 2017 in Borgholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)

BORGHOLM, SWEDEN - JULY 15: Prince Daniel of Sweden, Crown Princess Victoria of Sweden, Princess Estelle and Prince Oscar of Sweden is seen meeting the people gathered in front of Solliden Palace to celebrate the 40th birthday of Crown Princess Victoria of Sweden on July 15, 2017 in Borgholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)

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BORGHOLM, SWEDEN - JULY 15: Crown Princess Victoria of Sweden, Prince Daniel of Sweden, Princess Estelle of Sweden and Prince Oscar of Sweden is seen meeting the people gathered in front of Solliden Palace to celebrate the 40th birthday of Crown Princess Victoria of Sweden on July 15, 2017 in Borgholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)

BORGHOLM, SWEDEN - JULY 15: Crown Princess Victoria of Sweden, Prince Daniel of Sweden, Princess Estelle of Sweden and Prince Oscar of Sweden is seen meeting the people gathered in front of Solliden Palace to celebrate the 40th birthday of Crown Princess Victoria of Sweden on July 15, 2017 in Borgholm, Sweden. (Photo by Patrick van Katwijk/Getty Images)