Billy Ray Cyrus' mullet is the only thing that appears to have gotten old.
Here's the 31-year-old achy breaky singer back in 1993 (left) -- and 18 years later, the 49-year-old at an event earlier this month (right).
You'd think being Miley Cyrus' dad would age a fella.
Billy Ray Cyrus: Good Genes or Good Haircut?
7/17/2011 5:30 AM PDT BY Johnny Lopez
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