I don't have the evidence. But I'm 99% certain that he got her there. I don't think Joy's music ever sold well enough for her to have such high amounts of expendable cash.
This one is hilarious.
Also, it struck me as odd that Aaron didn't point out how out-PR her whole tweet saga was. Maybe that's because he was thinking about a chiefly non-scientology audience and felt that the weirdness and creepiness of her posts is enough.