With Paul McCartney celebrating his 72nd birthday Wednesday, see how he and other rockers from the 1960s and 1970s have aged over the years.
Some of today's biggest classic rockers got their starts years ago. Let's take a look at some of them today, starting with Paul McCartney, who is turning 72 on June 18, 2014. He's seen here at a charity event in Santa Monica, California, on Sept. 25, 2013.
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