The Princess' message was accompanied by a new picture of the royal teen. Queen Mary captured the photo of her daughter smiling at the camera, while holding an iPhone. Isabella was photographed ...

Queen Mary's daughter, Princess Isabella of Denmark ... Royal fans praised the modern approach, with one commenting: "Fantastic picture with a twinkle in the eyes and telephone in hand.

Princess Isabella, the daughter of Queen Mary and King Frederik X ... who dubbed her the "ultimate modern royal". The picture went viral almost instantly, sharply dividing people's opinions.

Mary held onto a bouquet of flowers as she and her husband both greeted members of the public, and enjoyed chatting. Taking to social media, the King and Queen ... also chose a picture of Isabella ...