Memphis Bleek

One hour after Jay-Z was supposed to be onstage Sunday night, almost half the Yankee Stadium crowd was still stuck outside the venue ... creating 3 hours of chaos behind the scenes for Jay, his superstar guests, NYPD, and fans. Sources smack in the middle of the situation tell TMZ ... the first…

Jay-Z was so pissed over his Yankee Stadium show being delayed, he wouldn't talk to a soul backstage ... so says Memphis Bleek. We got Memphis in New York City on Monday and our photog asked him what Hov was like backstage as he waited for hours to take the stage. Much like his audience, Jay was…