function Artist(artist) {
  this.data = artist.data
}

angular
  .module('app')
  .controller('ArtistShowController', ArtistShowController)

function ArtistShowController(artist) {
  this.data = artist.data
}

angular
  .module('app')
  .controller('ArtistShowController', ArtistShowController)

fix syntax error in ArtistshowController