Selena Gomez Goes Braless in Little Black Dress -

Looks like the only support Selena Gomez is getting these days is from her bf, The Weeknd ... based on the braless shots of her leaving dinner in NYC.

They're in town for his shows at Barclays Canter, but did dinner Tuesday night at Carbone in the West Village. On the way out, the paps started snapping ... and the flashes turned her little black dress see-through. It's the curse of the LBD, really ... and Selena knows it well.

Sometimes in showbiz, there's accidental exposure ... and then there's Bella Thorne.