The 19-year-old singer, the youngest sister of Miley Cyrus, has never made a secret of her battle with depression. Read more here

Confessing there were empty wine bottles scattered around their homes throughout the world, Elton revealed the issue came to a head in Los Angeles in 2014, two days before he due to start a U.S. tour. Read more here

Back in June, the star confirmed she had obtained a marriage licence.