Britain's Princess Anne, Princess Royal (R) arrives at Horse Guards Parade during the Queen's Birthday Parade, 'Trooping the Colour', in London on June 11, 2016. Trooping The Colour and the fly-past are part of a weekend of events to celebrate the Queen's 90th birthday. / AFP / OLI SCARFF (Photo credit should read OLI SCARFF/AFP/Getty Images)
