From the back of the box:
Inside everyone there's a SingStar
Get the party rocking with SingStar Pop Edition. It's time to sing with the girls, shout with the boys or step into the spotlight and go solo. With loads of online extras, including access to a library of top tracks, there's no excuse not to join in!
On the disc: 30 original tracks with support for high definition music videos plus access to the SingStore.