Bella Thorne must have been extra dirty, 'cause she spent a lot of time rolling around in a bathtub in next to nothing.

The hot scene was for the "Just Call" music video she's doing with Prince Fox -- but we imagine this is what bath time normally looks like for Bella, anyway. That's not just us, right?

The 19-year-old actress and singer's wardrobe was minimal -- bejeweled bra and panties. That's it.

Question: Would you drink her bathwater? 'Cause she did. Seriously. Watch.