A replacement knee has caused Aerosmith to cancel a festival appearance.
Aerosmith have been forced to cancel a gig after one of their members experienced problems with his replacement knee.
Joe Perry, guitarist with the veteran rockers, had to undergo emergency surgery after developing "unforeseen complications" with the joint.
The band was due to headline Venezuela's Solid Fest on February 1st, with other acts performing at the event including Daddy Yankee, Los Cadillacs and 50 Cent.
In a statement, Aerosmith frontman Steven Tyler said he thought playing the festival would have been the "perfect way" to begin 2009.
He added: "But having heard Joe had to revisit the hospital this month, the band are truly disappointed we can't be in Caracas and we hope to see everyone there soon."
Perry received his replacement knee in an operation performed last March and later attended November's American Music Awards with a cane.
Over the Christmas holidays the guitarist released a cover of Chuck Berry's Run Rudolph Run, which he offered for free as a gift to fans, according to the band's fan club Aero Force One.
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