9. ADELEThrough Adele's self-written ballads, it's obvious that she has experienced some turmoil in her life. Her father, Mark, who was estranged from Adele during her teen years, says that her lyrics come from her difficult childhood.
After Mark and Adele's mother split up when she was four, he moved away, and never paid child support. When she was 11, Mark became an alcoholic and completely absent from her life. Recently, though, he has curbed his drinking and is trying to reconnect. He picked a good time, considering that Adele owns pop radio these days.