america    american pop star    celebrity supporters    court papers    dark turn    demi lovato    dr. luke    entertainment venue    female artist    guessing game    inc. center    kelly clarkson    kesha    music industry    music video set    mystery entertainer    mystery mogul    north america    northern america    oliver higham-grady    pop singer    real name    record industry figure    seven-album deal    singer claims    staples    stefani joanne angelina germanotta    taylor swift    united states of america    valuable companies    world-famous american    young girl