A Queensland man has been accused of posing as popstar Justin Bieber to groom children and gain access to explicit images.
The man, 42, has been charged with 931 crimes involving 157 children dating back to 2007. Three of the charges were for rape.
He allegedly used Facebook and Skype to communicate with children and gain access to explicit images of them.
He was already facing a number of child sex charges when Australian detectives found hundreds of incriminating photographs on his computer.
"The fact that so many children could believe that they were communicating with this particular celebrity highlights the need for a serious rethink about the way that we as a society educate our children about online safety," said Detective Inspector Jon Rouse, who works with Task Force Argos, which investigates child sex crimes.
"The breadth of offences committed in this instance are frankly horrendous and I want to recognise the efforts and commitment of the investigative team at Taskforce Argos to keeping children safe."
Fifty of the alleged victims were in the US and six were in Australia. Police did not say where the 101 other alleged victims were from.
The man will appear in Brisbane Magistrates Court in early April.