Mel B -- Just Say No To Crack

Mel B looked like a Yukon miner on a digging expedition ... going in fist deep for SOMETHING.

Mel was all dolled up in Beverly Hills Monday for an outdoor photo shoot when she quite literally got her panties in a bunch. The question ... what is out of sorts?

A. Her thong
B. Errant poop
C. Her Shirt

The first option is plausible, but let's not jump to conclusions ... yet. The second is super questionable.

The third option is the most compelling -- she probably tucked her shirt into her skirt and did a simple pull-down.