Prince Louis and Prince George’s voices were heard during Princess Kate’s video message on Monday. The Princess of Wales confirmed in an emotional new video message alongside Prince William, Prince George, Princess Charlotte and Prince Louis that she has completed her chemotherapy treatment. Kate and William can be seen playing with their three young children in the woods, on the beach and in the sea during the emotional video as the Princess of Wales provides an update on her cancer battle. In a rare moment, the voices of Kate and William’s sons can be heard in the video. George is seen stari…