Daniela Katzenberger (39) has shared an emotional review on Instagram that lets her fans listen up. In a long article, the Realityikone cut together videos and photos from the past years – shots on which she grins in a good mood into the camera and makes jokes. But behind this facade a completely different reality was concealed, as she now describes with ruthless openness: "Always when I see photos or videos from three to four years ago, tears c…