Michael Jackson's voice is his own. He started at a very young age, remember, and always had the talent. He likes to sing while he performs. Some singers in their live concerts will prerecord their voices and lip synch so they can concentrate on the choreography; it's still their own voices singing their own music, but they're free to dance or perform theatrics without disrupting the music. Some, Michael Jackson included, consider doing all on stage part of the performance.Also, yes, he did become a Muslim at one point in his life.There's no news of an upcoming tour, even from his main website, so I'm uncertain on that.