I think in the future when some celebrities do convert to Christianity, somebody might use her star power to help the poor in let’s say China and Bangladesh, another helps her out in reaching out to and evangelising people there.
They’ll use their star power to help people out, which’s a big responsibility whenever they do evangelise to people at all and even to their fans. They might ditch anything worldly for anything holy and righteous, which’s a good sign of their conversion.