BBC News By Mark Savage image copyrightGetty Images image captionSingers including Demi Lovato, Justin Bieber and Britney Spears have spoken of the toll a career in music has taken on their mental health "We all just wanna be big rock stars / And live in hilltop houses, driving 15 cars." The wisdom of Nickelback, there, in the 2005 single Rockstar. It's a parody of a shallow musician's ambitions - but there can't be many singers who haven't dreamt, at least in passing, of living in that hilltop house. The reality of stardom is very different. Anyone who has watched Framing Britney or Billie Eilish's new documentary over the last two weeks will be acutely aware that fame often comes with a side helping of mental and physical health problems, not to mention alienation and loneliness.