Music on Sing-Along DVD question...

I have never bought a Sing-Along DVD. I just read an interesting review about the new Brother Bear DVD. The review claims that their is a feature on the DVD where you can listen to the songs in instrumental form so you can sing a la Karaoke (sp?). Is this true? Are the instrumental versions the original song versions minus the vocals? If this is true, this might be a great way to get the original songs in instrumental form. Let us know if you know! Thanks,

Your friend,
Louis Gonzalez