EA Mobile's Twitter feed spilled the beans ast night, and the company made it official today by announcing Rock Band for the iPhone and iPod Touch. It'll feature multiplayer, vocals, and 20 songs, listed on the jump.

A news release from EA mobile promises "live Bluetooth multiplayer" - OK, that part was all-capped, but we chose to spare your eyeballs. If you want to rock with friends not in the same room, the app says it will synch you up with bandmates via Facebook invitation. Yes, you read that right.

You get the same four instruments in the mobile version - git-tar, drums, bass and vocals. Multiplayer functions like it does in the console game - you'll hear your bandmates' missed notes and be able to save their ass with overdrive.

EA says it ships this month. It arrives with 20 songs (listed below) with more to come through an in-game music store.

The track list in the core game:

Attack-30 Seconds To Mars
Girls Not Grey – AFI
Move Along - All American Rejects
Sabotage - Beastie Boys
All The Small Things - Blink-182
Hanging on the Telephone – Blondie
Learn To Fly - Foo Fighters
Everlong - Foo Fighters
Bad to The Bone - George Thorogood & the Destroyers
Hymn 43 - Jethro Tull
Bad Reputation - Joan Jett
Simple Man - Lynard Skynard
Ace of Spades '08 – Motorhead
Debaser - Pixies
Ladybug - Presidents of The United States of America
Give It All - Rise Against
Lazy Eye - Silversun Pick Ups
Cherub Rock - Smashing Pumpkins
Take The Money and Run - Steve Miller Band
We Got The Beat - The Go Go's

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