How many interviews are there with Diana Allers?

Solution 1:

there are 3 interviews.

-The first interview takes place if Shepard speaks to Diana after Priority:Tuchanka has been completed and the genophage cure either real or fake has been dispersed.

-The second interview is after Shepard defends the Citadel from a Cerberus attack(you will get e-mail).

-The third interview takes place after Priority: Rannoch has been completed.