Adele is mourning the death of her estranged father after he passed away following a battle with cancer at the age of 57.MORE: Adele poses in swimsuit in sensational new birthday photosThe superstar and her father's relationship had been strained since 2011, when Mark Evans, who had walked out on her and her mother Penny Adkins when she was three years old, gave an interview in which he said the 33-year-old struggled to find love because she had "abandonment issues". WATCH: Adele impresses with