Aerosmith axeman Joe Perry has undergone successful knee replacement surgery. The surgery was performed last Tuesday, March 18th after being put off for two years so Perry could complete live commitments.Perry was put into ICU but doctors have eased his pain and transformed him to a private room. Perry will stay there through the end of the week then head home where he will recover until the end of the year.Funny, but I don't remember him having an affinity for playing guitar while sliding on his knees.