LISBOA CDP, PORTUGAL - OCTOBER 11: Queen Maxima and King Willem-Alexander of The Netherlands arrive at Teatro Nacional D. Maria II to attend a concert on October 11, 2017 in Lisboa CDP, Portugal. (Photo by Pedro Gomes/Getty Images)
LISBOA CDP, PORTUGAL - OCTOBER 11: Queen Maxima and King Willem-Alexander of The Netherlands arrive at Teatro Nacional D. Maria II to attend a concert on October 11, 2017 in Lisboa CDP, Portugal. (Photo by Pedro Gomes/Getty Images)