"Undated handout photo issued by the Heads Together campaign of Lady Gaga speaking to the Duke of Cambridge via FaceTime, as the Duke called for an end to the ""stiff upper lip"" culture, saying he wants Prince George and Princess Charlotte to be able to talk about their emotions. PRESS ASSOCIATION Photo. Issue date: Tuesday April 18, 2017. It comes after Prime Minister Theresa May praised his brother Prince Harry for his bravery in revealing he sought counselling to come to terms with the death of his mother Diana, Princess of Wales. See PA story ROYAL Diana. Photo credit should read: Heads Together campaign/PA Wire\nNOTE TO EDITORS: This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder."