The Foo Fighters have been joined by legendary rock icons like Alice Cooper and Roger Taylor during their recent shows. The band has teased that they have a few tricks up their sleeve for the show today, let's just be thankful we can all watch the show for free on the internet.

Update: Watch the performance here

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The Foo Fighters will be headlining the iTunes Festival today with a performance from the Roundhouse in London. The gig will be broadcast via live webstream of the performance on iTunes, and it's free! If that wasn't enough to get you interested check out this series of tweets that leads me to believe the band will be joined by Queen members Brian May and Roger Taylor (who already performed onstage with the Foo last week).

They also posted this video which hints that frequent Grohl collaborator and Motorhead frontman Lemmy Kilmister may join in the fun as well. This is all just well informed speculation, but you can find out what they really have up their sleeve today @ 3pm (8pm U.K. time) on  iTunes.