Eminem Disses Snoop in New Song, 'Zeus' and Apologizes to Rihanna

Eminem's clapping back at Snoop Dogg in a new song after Snoop left him off his top 10 rappers list ... and he's also giving Rihanna a long-overdue apology. The Detroit rapper just released a deluxe version of his album, "Music to Be Murdered By -…