[artist id="1269"]Jay-Z[/artist]'s march to battle continued right into East Rutherford, New Jersey, where he rocked the Summer Jam stage. Jay appeared as a guest of [artist id="1243444"]Young Jeezy[/artist] and performed his new record off of [article id="1613283"]Blueprint 3,[/article] [article id="1613390"]"D.O.A. (Death of Auto-Tune,)"[/article] for the first time.

Hov first appeared on the stage during "Put On," strolling out as the music set up his verse from the remix. The crowd cheered so uncontrollably, you could barely hear Jay rap.

"I put Marcy on the map, I put Brooklyn on my back," he began to rap, before getting drowned out by the crowd reciting his lines. "I put Fab back on the charts, I put Biggie in my raps/ I put Nas with Def Jam, I let Diddy do my tracks./ I put on for my city, that's a mother----ing fact/ ... I put Prodigy in his place on that Summer Jam screen."

Jay then took full control of the stage with "D.O.A."

"This ain't for iTunes, this ain't for singalongs," he rhymed. "This is Sinatra at the opera, bring a blonde ... My raps don't have melodies/ It should make jackers commit felonies/ This ain't a #1 record, this is practically assault with a deadly weapon."

[artist id="1998098"]T-Pain[/artist] came out and stood beside Hov, arms folded in a B-boy stance and wearing an ice grill. Jay hugged him. After all, Jay's song does admonish rappers who stole Pain's steez.

"You rappers singing too much/ Get back to rap, you T-Pain-ing too much/ I'm a multi-millionaire/ So how am I the hardest n---a here?"

Earlier in the day, Pain told MTV News that he fully agreed with the sentiment on Jay's record that [article id="1612158"]the use of Auto-Tune was getting played out[/article].

"He only makes it better for me," Pain said of "D.O.A."

On Friday, Jay debuted "D.O.A." on Funkmaster Flex's radio show. He explained a little about his inspiration for the record.

"The guys who did it, did it great," Jay told Flex and Mister Cee. "T-Pain, he does great melodies. If you listen to Kanye, great melodies. If you listen to [West's] 'Say You Will' or 'Heartless,' great melodies. [Lil Wayne and T-Pain's] 'Lollipop' was a fantastic melody. Everybody can't do it. Let them guys do it. They got their little niche, let's move on. That's just my opinion. I don't know if everybody feels the same way."

Other Summer Jam surprise appearances included Busta Rhymes and Jeremih with Jadakiss; and DJ Khaled, Ace Hood, Lil' Kim, and Redman and Method Man appeared with Mary J. Blige.