I spoke to people who have managed Bieber-style musical acts. They tell me that most musicians are not nearly so stupid as to keep porn or naked photos on their laptops, and that probably includes Justin Bieber.
"I haven't seen much in that arena, but then again we tell our bands not to keep that kind of material on their computers just in case they get hacked or its stolen," one manager told me.
However, it is common for musicians to produce music on their computers. Will.I.Am and Bieber were reportedly collaborating that way when, yes, the former's computer was stolen last month.