No, Gary Busey is not screaming about pizza on the corner of Broadway and 8th Street because he's having a bad trip. It's for an episode of Celebrity Apprentice. Also on hand: a bunch of other D-listers!

Busey was joined by former Sugar Ray singer Mark McGrath (see below), rapper Lil Jon, and washed up heartthrob David Cassidy at a pizza joint in the Village this afternoon as a part of some challenge for the show, which is currently filming in New York.

Thanks to Robespierre2010 who sent these photos in. If you have a sighting of your own, you can email us or post it to #stalker yourself.

Update: Here's a pic of Lil Jon that another tipster sent in: