Не работает контроллер в Angular 1.5.6

У меня есть приложение на Angular 1.5.6 . В нем есть контроллер который отдает в вид список песен(да-да говнокод ещё тот :) ).

    angular.module("demo").controller("SimpleDemoController", ['$scope', function($scope, $http) {
    $scope.models = {
        selected: null,
        lists: {"Playlist": [
                {
                    "id": 1,
                    "label": "98 Degrees - Christmas Wish"
                },
                {
                    "id":2,
                    "label": "Anne Shelton - Merry Christmas"
                },
                {
                    "id":3,
                    "label": "Bon Jovi - I Wish Everyday Could Be Like Christmas"
                },
                {
                    "id":4,
                    "label": "Celine Dion - Don't Save It All For Christmas Day"
                },
                {
                    "id":5,
                    "label": "Chris Isaak - Let It Snow"
                },
                {
                    "id":6,
                    "label": "Chris de Burgh - On A Christmas Night"
                },
                {
                    "id": 7,
                    "label": "Christina Aguilera - These Are Special Times"
                },
                {
                    "id": 8,
                    "label": "Christina Perri - Happy Xmas (War Is Over)"
                },
                {
                    "id": 9,
                    "label": "Colbie Caillat - Have Yourself A Merry Little Christmas"
                },
                {
                    "id": 10,
                    "label": "Darius Rucker - Candy Cane Christmas"
                },
                {
                    "id":11,
                    "label": "Dean Martin - White Christmas"
                },
                {
                    "id": 12,
                    "label": "Diana Krall - Christmas Time Is Here"
                },
                {
                    "id": 13,
                    "label": "Diana Ross - Let It Snow! Let It Snow! Let It Snow!"
                },
                {
                    "id": 14,
                    "label": "Elvis Presley - Silver Bells"
                },
                {
                    "id": 15,
                    "label": "Enya - We Wish You A Merry Christmas"
                },
                {
                    "id": 16,
                    "label": "Frank Sinatra - Jingle Bells"
                },
                {
                    "id": 17,
                    "label": "Glen Campbell - Ill Be Home For Christmas"
                },
                {
                    "id": 18,
                    "label": "Justin Bieber - Mistletoe"
                },
                {
                    "id": 19,
                    "label": "Leona Lewis - One More Sleep"
                },
                {
                    "id": 20,
                    "label": "Mary J Blige - When You Wish Upon A Star"
                },
                {
                    "id": 21,
                    "label": "Michael Buble - Let It Snow"
                },
                {
                    "id": 22,
                    "label": "Nat King Cole - Caroling, Caroling"
                },
                {
                    "id": 23,
                    "label": "Pat Boone - Silver Bells"
                },
                {
                    "id": 24,
                    "label": "Paul McCartney - The Christmas Song"
                },
                {
                    "id": 25,
                    "label": "Perry Como - Magic Moments"
                },
                {
                    "id": 26,
                    "label": "Rod Stewart - Let It Snow! Let It Snow! Let It Snow!"
                },
                {
                    "id": 27,
                    "label": "Rosemary Clooney - Winter Wonderland"
                },
                {
                    "id": 28,
                    "label": "Sarah Connor - Christmas In My Heart"
                },
                {
                    "id": 29,
                    "label": "The Manhattan Transfer - A Christmas Love Song"
                },
                {
                    "id": 30,
                    "label": "Toni Braxton Babyface - Have Yourself A Merry Little Christmas"
                }
            ],
            "UserSongs": []}
    };
    $scope.$watch('models', function(model) {
        $scope.userPlayList = [];
        $scope.modelAsJson = angular.toJson(model, true);
        if ($scope.models.lists.UserSongs.length === 10) {
            console.log('10 песен выбрано');
            $scope.userPlayList = $scope.models.lists.UserSongs;
            console.log($scope.userPlayList);
            $scope.userPlayList = $scope.models.lists.Playlist;
            var list_of_song = $scope.models.lists.UserSongs;
            // магия аякса в ангуляре
            // $http.defaults.headers.post["Content-Type"] = "application/x-www-form-urlencoded";
            $http.post('https://www.radiorelax.ua/special/newyear/data/', {list_of_song})
                .success(function (data) {
                    console.log('done');
                    console.log(data);
                    angular.element('.submit-button-send')[0].disabled = false;
                })
                .error(function (error) {
                    console.log('error');
                });
        }
        if($scope.models.lists.UserSongs.length === 11){
            var deleted_song = $scope.models.lists.UserSongs.pop();
            $scope.models.lists.Playlist.push(deleted_song);
        }
    }, true);
}]);

Собственно сам вид (simple.html):

<ul dnd-list="list"> <li ng-repeat="item in list" dnd-draggable="item" dnd-moved="list.splice($index, 1)" dnd-effect-allowed="move" dnd-selected="models.selected = item" ng-class="{'selected': models.selected === item}"> <span class="badge">{{item.id}}</span> {{item.label}} </li> </ul>

и модуль приложения:

<div ng-app="demo">
    <div class="block-center">
       <div ng-view></div>
    </div>
</div>

Так всё работает, но мне нужно дописать функцию которая будет показывать модальное окно вот собственно она:

$scope.videos = function () {
    $ngConfirm({
        content: '<p></p> ' +
            '<div class="embed-responsive embed-responsive-16by9">' +
                '<iframe class="embed-responsive-item" src="https://www.youtube.com/embed/3Wv-JIpAjks">' +
                '</iframe>' +
            '</div>',
        theme: 'seamless',
        icon: 'fa fa-check-circle-o',
        buttons: {
            white: {
                text: 'Increase size',
                btnClass: 'btn-green',
                action: function (scope, button) {
                    this.setColumnClass('medium');
                    button.setDisabled(true);
                    return false;
                }
            },
            close: function () {
            },
        },
        onOpen: function (scope) {
            scope.data = this;
        }
    });
};

Для того что бы функция начала работать нужно добавить зависимость в контроллер и переписать его так:

angular.module("demo", ["cp.ngConfirm"]).controller('SimpleDemoController', ['$scope',function ($scope, $ngConfirm) {
//код
}

Но когда добавляю зависимость cp.ngConfirm перестаёт всё работать. В чем может быть причина?