Singer Halsey suffered embarrassing wardrobe malfunction when a guest stepped on her dress and left her over-exposed on amFAR red carpet

The 23-year-old star wore a black strapless dress with a daringly high split up the side. It revealed a lot of flesh but when the man behind her unwittingly stepped on the hem of her skirt, the slit opened even more and flashed her underwear.

Hayley managed to maintain her cool and simply turned to give the man a look before marching forward for pictures. 

See more photos below.