There are a couple of good reasons to stay up late tonight (or at least set the DVR).

First, it’s a very special “Tonight Show” (11:35, NBC), as Conan O’Brien will host Snooki and Mike – “The Situation” – from MTV’s “Jersey Shore.” Lord knows what they’ll talk about for 40 minutes. Probably a good part of it will be about Snooki getting socked in the face at a bar, which, after teasing it, MTV now says it won’t show. (Really, MTV, now you develop a conscience?) Tonight will probably be a train wreck, and who doesn’t like watching something like that? Wonder if Snooki will wear her fabric necklace/blouse from the first episode, the one so skanky even strippers wouldn’t wear. And the massively insecure The Situation will undoubtedly give a display of false bravado that will make you wince. Good stuff.

Then when that’s done, head over to Craig Ferguson’s “Late Late Show” (12:35 a.m., CBS) and celebrate the show’s 1,000th episode. Don’t look for Craig though – the show’s being taken over by puppets tonight, with Wavy the crocodile hosting. The guests are awesome – Jason Segel (“How I Met Your Mother”) will perform a song with the Broken West (very cool band) and his Dracula puppet from “Forgetting Sarah Marshall.” Speaking of which, Kristen Bell will also make an appearance. And so will Jason Schwartzman and Maria Bello. This should be the coolest hour of the night.

Here’s a puppet-less version of Segel’s song.