The wear and tear of decades on stage has done enough damage to Aerosmith frontman Steven Tyler's knees that one of them requires a full replacement.  Tyler, already writing a book and planning to record a solo album, says the next operation comes after so many other surgeries on his lower extremeties that,  '...just to be standing is a miracle'.   The singer expects to go under the knife in November and spend between three and four months recovering from the operation before being comfortably up and about.
HenneMusic.com

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