A look into the Mirror Ball shows Neil Young is ill and will remain "Downtown".

The 75th Annual Peabody Awards Ceremony - Show
Getty Images for Peabody Awards
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David Letterman will step in and pinch hit introducing an act he featured many, many times on his Late Show: Pearl Jam.

David and his hairy face will be at the Barclays Friday night in Brooklyn to present Pearl Jam for induction into the Rock n Roll Hall of Fame.