Instructions
Power on your Xbox 360. Plug in the controller (for corded controllers) or sync up a wireless controller. To sync a wireless controller, press the large "Xbox" logo button in the center of the controller and hold it down until it stops blinking and displays a solid light. Insert the Xbox 360 headset into the plug on the game controller.
Load the video game, and sign into your Xbox Live account with your gamertag and password.
Select "Online" as your gaming option on the main menu of the game screen once you have signed into Xbox Live.
Send friend invites through the Xbox 360 "Dashboard" messaging system to the players that you want to play the game with, and turn your headset on and the volume up.
Talk to your friends using your headset and microphone once they have joined your game. You can communicate with your friends during the game and beforehand when selecting a song.