That's Incredible!

5/1/2009 2:15 AM PDT BY TMZ STAFF
The 67-year-old resurfaced backstage at "American Idol" with Paula Abdul this week, looking unbelievable.

John Davidson

John was voted best looking in his high school yearbook.

In 1977, Davidson was the headlining act at Kentucky's Beverly Hills Supper Club the night a fire burnt it down and claimed the lives of 165 people.