American Idol Cheats

Unlock additional costumes
Password - HTH4&6CK
Unlocks last 3 practice songs
Password - Z999&6QR

Enter this password:
Z999&6QR

To unlock extra outfits, like more for outfit 8, go, to the mode where you keep on going and finish the game. When you see the lock unlocking at the botom right of the screen, you have unlocked new outfits.

Some outfits are:
10
The rest of 8
Some more 4
Some more 3

and others to.