Instructions
Enter the "My Xbox " menu. Select the "Game Marketplace" from this menu.
Select "Browse" in the Marketplace. Select "Game Add-Ons" in the browsing menu.
Find and select "DDR Universe 3" in this area. Choose the song you want to add to your game and select it.
Select "Confirm Download." Return to the Xbox Dashboard and select the game.
Open the game's song list. Access the track from list.