Amy Poehler

In her excitement over arriving at the Late Show, the delightful Ms. Poehler accidentally left her Show & Tell item in the car.  She ended up just describing the severed human hand she'd purchased at a morgue rummage sale.

How did you like that one, gum?

Gum: "Eh, so-so.  No gum content, and nothing about the actual particulars of the celebrity.  I do like the whimsical riff on a minor detail, though you seem to rely on that a lot.  You've been doing better with getting stars' faces in the photos, which I appreciate. Overall, a B."

Wow, gum, you're a tough audience.