Who cares? Unlike most pop hacks these days who appear on TV, both Eminem and Rick Rubin are talented. So what if they use a back up track sometimes, cause both of them can handle their biz. TV is TV, it is what it is.
That said, Rubin's old ass very well may have been playing that shit sideways. Anything is possible. It's not like he doesn't know what he's doing.
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