Diddy’s ex-girlfriend Daphne Joy is living in a whole different reality — while he faces the heat in his federal criminal trial, she’s out pumping gas in her luxury whip.

Daphne was serving gas-station glam Wednesday in L.A. — rocking a perilously low-cut black top that flashed her lace bra, paired with skintight bootcut jeans that put her curves on full display.

The model was lookin’ fire — full glam makeup, flawless flowing locks catching the breeze, all while casually handling business at the pump like a total queen.

Daphne’s not only physically thousands of miles away from Diddy’s legal drama … she seems mentally detached from it, because she looked like she was in great spirits.