new south wales police say hamdin touched the 15-year-old girl inappropriately during the concert of u.s. rappers yg and ty dolla $ ign theatre , in sydney 's inner-west , on australia day this year .
new south wales police say hamdin and the girl had been kissing and dancing at the enmore theatre on australia day .
charges were laid against hamdin after a violent brawl broke out during the australia day rap concert being assaulted .