Heidi Montag took a few friends shopping yesterday on Robertson -- coincidentally the most visible street in LA and a known hot-spot for celebs (and paps).

Perhaps Ms. Montag is willingly putting herself in front of our cameras ahead of her upcoming reality show for VH1. Publicity anyone???

In the new reality series, Heidi and other reality alums, including The Bachelor's Jake Pavelka and Real Housewives' Danielle Staub, will go into the food biz together and rebuild and re-brand a failing restaurant.

Question -- what does skinny Heidi know about food?