Dre made an appearance in the Jay-z/Eminem concert, you heard it here first!
11:50 PM SR: Surreal moment of the year. Dr. Dre is onstage performing right now with Eminem. Dre did "Still D.R.E" and now they are doing "G-Thang." Em is rapping Snoop's part
11:51 PM Sway: Oh sh**! Dre is doing "Still Dre!" OMG! Being originally from the WEST I'm n heaven!! Dre looks like he sleeps in the gym! People are staring in disbelief and so am I
11:52 PM Sway: "Next Episode!" Damn! Em got the whole crowd chanting DETOX!!!
11:54 PM SR: "Got dammit Detroit. Do I love you or what?" Eminem says. "Look what I brought out for you." Em then tells he wants Dre to feel all the love. Detox chants follow."Deeee-tox. Deeee-tox," crowd yells. Dre just says "I'm Comin!" They go into "Crack a Bottle."
Source - http://www.thisis50.com/forum/topics/jayzeminem-detroit-concert?commentId=784568%3AComment%3A21633466&xg_source=activity