What visa do foreign porn stars need to apply for to be able to work in the US?

[alexisbigballs]

Question is self explanatory, what visa do porn stars need to apply for to be able to work in the US? I have seen chatter else where that it is either a O-1, which are normally reserved for runway models or a B-1, a temporary business visa. Does anyone have any insight into the matter? Someone that I am a fan of is trying to come to the US to shoot and she's asking for help with figuring out what visa to apply for. I told her to contact the companies who are trying to hire her to refer to their legal council, but that has gone nowhere as of yet. Any help would be appreciated.