-Go to this website and save a .wav at 1000 hertz:http://onlinetonegenerator.com/
-Boot up "You're on Your Own" mode.
-Select "Camp Rock - Hasta La Vista".
-Open up the .wav (I used Windows Media Player) and change the settings so it loops the .wav when it finishes.
-Plug in a pair of earphones and hold them up against the microphone.
This should also unlock:
Afterwards select "Duet" mode and repeat the steps to unlock:
Then again in "Versus" mode to unlock: