I don't think that The Beatles or Jimi Hendrix ever won Grammys.
Brian Wilson won a Grammy for the noisy instrumental track on SMiLE, not any of the lyrics, concepts, ability, recovery, etc.
They are a sham awards program. Based on cliques and not sales or talent.
And if you need any more proof...just look at the Grammy award winning duo....Mili Vanilli. *snickerin*