Had a look and couldn't find this, seem to be way cheaper than anywhere i can see (sure somebody will prove me wrong, lol)
Guitar Hero World Tour delivers more ways to play than ever before. Virtual musicians can live out their rock and roll fantasies by playing either a single instrument, or any combination of instruments, in addition to the full band experience.
In addition to all of the online gameplay modes from Guitar Hero III: Legends of Rock, Guitar Hero World Tour introduces Battle of the Bands mode which allows eight players to join online and challenge each other band-to-band to determine who is the best of the best. In the Band modes, up to four players can jam together, online or off, as they progress through the game, and in single-player Career Mode, players can jam on any of the instruments in branching venue progression enabling them to rock out in the order of their choice.
Biggest selection of on-disc music with 86 master tracks, including...
Airbourne - Too Much Too Young
Blink-182 - Dammit
Bullet For My Valentine - Scream Aim Fire
Creedence Clearwater Revival - Up Around The Bend
Foo Fighters - Everlong
Jimi Hendrix - Purple Haze (Live)
Joe Satriani - Satch Boogie
Linkin Park - What I've Done
Lynyrd Skynyrd - Sweet Home Alabama (Live)
Metallica - Trapped Under Ice
Muse - Assassin
Nirvana - About A Girl (Unplugged)
No Doubt - Spiderwebs
Ozzy Osbourne - Crazy Train
Sex Pistols - Pretty Vacant
Survivor - Eye Of The Tiger
Van Halen - Hot For Teacher
Willie Nelson - On The Road Again