This is one of my 'this will look cool' ideas that actually worked out.

When we remodeled the kitchen we built the soffits over the cabinets with 'bullnose' corner bead on the drywall so that the front corner of the soffit is rounded. We have now installed the same crown we used everywhere else right on the edge of the bullnose to set off the soffit and the cathedral ceiling.

And yes those are indirect lights hidden behind the crown. More details on the next picture.