"Selena has been ordered to appear on April 23, 2014, to be deposed in Los Angeles," the source exclusively confirms.
We're told that Selena will be questioned about "anything she observed before, during, and after the May 2012 incident with Duran and Bieber."
Some of the other topics on the table include her "relationship with Justin, then and now," "if she ever witnessed any use of Justin taking controlled substances" and "if she had seen any episodes of violence or anger involving Justin," the source added.
Additionally, Gomez will be asked about "conversations she had with Justin concerning the Duran episode and any other legal proceedings." Gomez will also be questioned about his now-infamous deposition in Florida, the one he walked out on when the plaintiff's lawyer asked him about his ex.
Bieber is also expected to be subpoenaed for deposition in the Duran case in about two to three months and they intend to videotape Gomez's deposition.