Halsey is in her 'dirtbag girl' era ... the songbird was seen in a black lingerie bra and matching underwear as her dark hair was in tangles around her face. The stunner was also seen flashing ...

As for her hair, the singer tied up her fuchsia pink tresses into a chic messy updo combining curls, bangs and loose braided strands. The result framed her face like a work of art. Halsey wasn’t ...