JUSTIN Bieber sent fans into hysterics when he appeared to wear Kim Kardashian's Skims underwear in a hilarious billboard blunder.
The singer's brooding Balenciaga ad accidentally matched up with a woman's bare legs in the Skims ad - making it look like Justin was rocking just a pair of briefs.
The top half of the billboard featured Justin's moody face and torso, with the singer wearing a black leather jacket and a white T-shirt.
The bottom half, however, still featured soccer player Alex Morgan's midriff and shapely legs as she modeled a pair of grey briefs from Kim's Skims X Team USA collection.
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