Nick Cannon Takes Pants Off -- Delivery Car

The actor was spotted at PNB Nation clothing store on Melrose Avenue last night ... working.

As a new shipment of denim arrived at the store -- Cannon, who's a part-owner of the high-end label, grabbed some jeans and started carrying them inside! How blue collar of him!

The former Nickelodeon star also recruited a few familiar child laborers; Chase and Chad, who TMZ spotted flipping the bird at cameras last week while they posed for pics with Nicole Richie and Nicky Hilton.