Sources connected to the Jackson family said Jackson became angry when young girls began tweeting about cutting themselves out of love for Bieber and he said nothing to discourage them.
Jackson also became angry when photographs of the pop star smoking weed in a hotel in January were leaked, the sources told TMZ. She thinks Bieber owes it to his fans to be more of a role model.
Jackson is currently at UCLA Medical Center after receiving treatment for cutting herself with a knife and taking 20 Motrin, TMZ reported Saturday.
Bieber and Jackson both live in the same gated community in Calabasas, Calif.