"Shrek in the Swamp Karaoke Dance Party" was a DVD add on for the first movie - CinemaDave

As a DVD extra, "Shrek in the Swamp Karaoke Dance Party" featured more singing and dancing from hit songs of the baby boomer generation, the Bee Gees, Boy George and Madonna among the featured artists.

Worth a peek for the kiddies, but rather creepy animation from the characters, their eyes just stare at you like a George Romero zombie.