Finally, Rock Band has arrived on the iPhone and iPod Touch. This mobile version lets you use four different instruments: guitar, bass, drums, and vocals. It will also come with 20 tracks and more song packs will be available as an in-app purchase. Video after the break.

If you want to play through various gigs as your band seeks fame and fortune there’s a world tour mode, and if you have friends with the game both online and local bluetooth multiplayer is included.

[via JoystiqToucharcade]