Justin Timberlake can't hold in his excitement, Katherine Heigl gets lit with Dave Letterman, plus more from Martha Stewart and other stars
Credit: Mitch Haddad/ABC
Updated: Friday Oct 01, 2010 | 06:00 AM EDT
By: Christie LaRusso
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"Is that on PBS?"– Zach Galifianakis, claiming ignorance about The Jersey Shore, on Jimmy Kimmel Live!
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