gistfile1.js

Backbone.Router.extend(_.extend(redirectRouter, {
  routes: {
    '': 'index',
    
    'search/:query/p:page': 'search', // #search/kiwi/p7
    'song/:id/': 'song' // #song/87336123/
    // ...
  },
  
  search: function(query, page) {
    // ...
  }
});

app.router.navigate('song/87336123');