The debate is fully at rage online about whether or not Madonna really played the guitar solo to "Ray of Light" at her performance for Live Earth London. I saw Madonna play the guitar at her show last year in Los Angeles, but it was a fairly weak performance. I think she completely could have faked it, but why? She's confident enough to just get a "real" guitar player to share the stage with her and perform. What do you guys think? I think this is another ingenious move on her part to garner more publicity.
It has also been claimed that the length of Madonna's fingernails would make it impossible to play the guitar properly, although a close inspection of photographs from the show reveal she had them closely clipped for the occasion.