The 65-year-old, wearing aviator-style glasses and helmet hair, looked almost identical to the singer who died suddenly from a heart attack in 1988.
"He was and always will be one of the greats of rock 'n roll." McCartney said of the Texan whose hits include 'You Got It' and 'Crying'.
Paul has remained friends with Orbison's widow Barbara and she was among the special guests at his concert at the Amoeba Record store in Los Angeles, California last year.
Earlier this week McCartney dismmed reports that he had a heart procedure last year as "entirely untrue."
"People are ringing and texting me saying, 'Are you OK?"' he writes in a posting on his newly redesigned Web site.
MACCA CALLS FOR SEAL PROTECTION
Paul McCartney has criticised Canada's annual seal hunt and asked animal lovers around the world to pressure the European Union to ban seal products.
The EU is accepting public comments on the proposed ban until February 13, and the former Beatle said it's a chance for people everywhere to help end the commercial slaughter of seals.
"Like me, you've probably seen the horrifying images of helpless baby seals being beaten and shot for their fur," he said.
"Wounded seals left to suffer in agony. Conscious pups sliced open. And the reason for their pain? So that someone can sell their fur."
Macca and his estranged wife Heather Mills traveled to the harp seal nursery on the Gulf of St Lawrence in 2006 to protest against the annual hunt.
The traditional spring hunt is important to the livelihood of Canadian seal hunters and aboriginal peoples. Fishermen sell seal pelts mostly for the fashion industry in Norway, Russia and China, as well as blubber for oil, earning about 78 US dollars per seal.
The music star said a ban on the trade of all seal products in the EU could spell the end of many commercial seal hunts. He said that, if the hunt does end, governments should find employment alternatives for seal hunters and compensate them for lost income.
"A European Union ban on all seal product trade would force nations where seal hunting has taken place to invest in real alternatives - jobs that will provide safe and sustainable futures," he said.
source & here too.