Rapper A$Ap Rocky has come under fire in Australia after a video emerged online appearing to show him striking a female fan in the face during a gig in Sydney.

Footage from the hip-hop star's concert at the city's Hordern Pavillion on Friday (28Jun13) shows a young woman reaching down from a balcony and tapping him on the head before blowing a kiss to the rapper, who appears to respond by striking her cheek.

The clip, which was taken as A$AP Rocky was walking through the crowd to leave the show, was uploaded to YouTube.com and has since gone viral, while the story has also hit headlines across Australia.

The star concluded his Australian tour over the weekend (29-30Jun13).