Lil Jon -- along with singer-songwriter Meat Loaf, eccentric actor Gary Busey, 'The Partridge Family''s David Cassidy and John Rich of country duo Big & Rich, Sugar Ray lead singer Mark McGrath and retired baseball player Jose Canseco -- caused a bit of a sidewalk traffic jam when spotted working at a New York pizzeria this afternoon. The oddball mix of celebs were serving up slices at a Famous Famiglia while filming an episode of 'Celebrity Apprentice.'

Lil Jon manned the outside, holding a sign that read "Buy a Pie for Charity." Busey, in a burnt orange suit and his signature manic appearance, took to the streets to corral pedestrians inside. McGrath, Meat Loaf, Cassidy and Canseco stayed inside the pizza place, served slices and snapped pics with fans and big donors.

The group appeared to be peddling pizza for charity but it's unclear who the proceeds from today's challenge will benefit. This season of 'Celebrity Apprentice' is set to air on NBC in March with the finale taking place in May.