diff --git a/frontend/ng-karaoqueue/src/app/models/artist.model.ts b/frontend/ng-karaoqueue/src/app/models/artist.model.ts
index 4abac61..2802a54 100644
--- a/frontend/ng-karaoqueue/src/app/models/artist.model.ts
+++ b/frontend/ng-karaoqueue/src/app/models/artist.model.ts
@@ -1,4 +1,10 @@
 export class Artist {
+
+  constructor(id: number, name: string) {
+    this.id = id;
+    this.name = name;
+  }
+
   id: number;
   name: string;
 }
diff --git a/frontend/ng-karaoqueue/src/app/models/genre.model.ts b/frontend/ng-karaoqueue/src/app/models/genre.model.ts
index 295d091..bb23a14 100644
--- a/frontend/ng-karaoqueue/src/app/models/genre.model.ts
+++ b/frontend/ng-karaoqueue/src/app/models/genre.model.ts
@@ -1,4 +1,16 @@
 export class Genre {
+
+  constructor(id: number, name: string) {
+    this.id = id;
+    this._name = name;
+  }
+
+
+  public get name() : string {
+    return this._name;
+  }
+
+
   id: number;
-  name: string;
+  _name: string;
 }
diff --git a/frontend/ng-karaoqueue/src/app/models/language.model.ts b/frontend/ng-karaoqueue/src/app/models/language.model.ts
index a3b8653..666a833 100644
--- a/frontend/ng-karaoqueue/src/app/models/language.model.ts
+++ b/frontend/ng-karaoqueue/src/app/models/language.model.ts
@@ -1,4 +1,10 @@
 export class Language {
+
+  constructor(id: number, name: string) {
+    this.id = id;
+    this.name = name;
+  }
+
   id: number;
   name: string;
 }
diff --git a/frontend/ng-karaoqueue/src/app/models/song.model.ts b/frontend/ng-karaoqueue/src/app/models/song.model.ts
index 97f25b6..5e5e818 100644
--- a/frontend/ng-karaoqueue/src/app/models/song.model.ts
+++ b/frontend/ng-karaoqueue/src/app/models/song.model.ts
@@ -3,12 +3,24 @@ import { Language } from './language.model';
 import { Artist } from './artist.model';
 
 export class Song {
-  explicit: boolean;
-  duet: boolean;
+
+  constructor(title: string, artist: Artist, karafun_id: number, duet: boolean, explicit: boolean, id: number, genres: Array<Genre>, languages: Array<Language>) {
+    this.title=title;
+    this.artist=artist;
+    this.karafun_id=karafun_id;
+    this.duet=duet;
+    this.explicit=explicit;
+    this.id=id;
+    this.genres=genres;
+    this.languages=languages;
+  }
+
   title: string;
-  id: number;
+  artist: Artist;
   karafun_id: number;
+  duet: boolean;
+  explicit: boolean;
+  id: number;
   genres: Array<Genre>;
   languages: Array<Language>;
-  artist: Artist;
 }