You mean to tell me that you actually believe that a band would go onto the grammys, the biggest night for the music industry, and fake playing instruments? Give me a break. You and your friend both must be pretty daft. Get on Kazaa, download the video where they are playing the song "let's build a home" on conan, and tell me that Jack really isn't playing that awesome slide guitar solo on conan's desk. This is Jack White, the 17th greatest guitar player of all time (according to Rolling Stone Mag), not Milli Vanilli. Maybe next your friend will tell you that Les Claypool or Flea fake playing bass.