Everything I know, and have read, gives a big "no" to accidental possession while astral projecting. Nothing can posses you unless blatantly allowed, which is why we are told to be careful with ouija boards and the like, and why so many cases leading to exorcism begin with a haunting and depression (negative spirit beating down ones will to reject it)
The most practical answer is Myder's, but if you are really looking for an occult reason.. it is possible for any person (including celebs) to decide to
allow a possession. Perhaps they think the being will grant them greater power, talent, who knows. Perhaps it was an accidental allowing and the didn't expel it for a variety of possible reasons.
