title: error TS2339: Property 'results' does not exist on type 'Response'
body: <p>I followed a piece of code building and app that collect data from last.fm using angular2, typescript and firebase.</p>
  
  <p>the source code can be found here: <a href="https://github.com/vtts/mytunes" rel="nofollow">https://github.com/vtts/mytunes</a></p>
  
  <p><strong><em>QUESTION how can I cast the results from the json calls?</em></strong></p>
  
  <h2>Source code on github</h2>
  
  <p><a href="https://github.com/vtts/mytunes/blob/master/app/music/services/music.srv.ts" rel="nofollow">https://github.com/vtts/mytunes/blob/master/app/music/services/music.srv.ts</a></p>
  
  <h2>I receive the following errors:</h2>
  
  <pre><code>app/music/services/music.service.ts(29,39): error TS2339: Property 'results' does not exist on type 'Response'. 
  app/music/services/music.service.ts(51,36): error TS2339: Property 'album' does not exist on type 'Response'.
  </code></pre>
  
  <h2>package.json</h2>
  
  <pre><code>{
    "name": "mytunes",
    "version": "1.0.0",
    "scripts": {
      "start": "tsc &amp;&amp; concurrently \"npm run tsc:w\" \"npm run lite\" ",
      "lite": "lite-server",
      "postinstall": "typings install",
      "tsc": "tsc",
      "tsc:w": "tsc -w",
      "typings": "typings"
    },
    "license": "ISC",
    "dependencies": {
      "angular2": "2.0.0-beta.15",
      "bootstrap": "^3.3.6",
      "es6-shim": "^0.35.0",
      "firebase": "^2.4.2",
      "reflect-metadata": "0.1.2",
      "rxjs": "5.0.0-beta.2",
      "systemjs": "0.19.26",
      "zone.js": "0.6.10"
    },
    "devDependencies": {
      "concurrently": "^2.0.0",
      "lite-server": "^2.2.0",
      "typescript": "^1.8.10",
      "typings": "^0.7.12"
    }
  }
  </code></pre>
  
  <h2>tsconfig.json</h2>
  
  <pre><code>{
      "compilerOptions": {
          "target": "es5",
          "module": "system",
          "moduleResolution": "node",
          "sourceMap": true,
          "emitDecoratorMetadata": true,
          "experimentalDecorators": true,
          "removeComments": false,
          "noImplicitAny": false,
          "outDir": "js"
      },
      "exclude": [
          "node_modules",
          "typings/main",
          "typings/main.d.ts"
      ]
  }
  </code></pre>
  
  <h2>Last.fm REST API</h2>
  
  <p>I am using the following REST APIs:</p>
  
  <ul>
  <li><a href="http://www.last.fm/api/show/album.search" rel="nofollow">http://www.last.fm/api/show/album.search</a></li>
  <li><a href="http://www.last.fm/api/scrobbling" rel="nofollow">http://www.last.fm/api/scrobbling</a></li>
  </ul>