Zach Galifianakis (LIVE SHOW)
Fly on the Wall with Dana Carvey and David Spade
00:00
Zach, What's Up, Zach?
"I'm punchy. I'm over tired," says the host of "This Is Life with David Letterman" The show airs on ABC at 8 p.m. ET/PT and 11 a.m. EST (GMT-8).
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