Sean 'P Diddy' Combs and Jay Z

Sean ‘P Diddy’ Combs and Jay Z (UPI)

Diddy and Jay Z — the richest rappers in hip-hop — partied before Jay’s “Legends of Summer” show with Justin Timberlake in Hollywood Saturday night. Spies said guests at Sound Nightclub including Kevin Durant, Nicole Scherzinger and Ne-Yo partied till 3 a.m. as Jay kept texting DJ
Jus Ske to play certain tracks off his new album. The fete was an advance party to celebrate a show the next night at the Rose Bowl in Pasadena. But then on Sunday, we hear, Jay Z made a game-time decision to put together another bash after the show, too. While he performed for 56,000 fans, staffers scurried to turn a private backstage area into an intimate nightclub: DJ Cassidy, who’d warmed up the crowd, then moved his turntables backstage and a bar was set up with 25 bottles of Jay’s cognac, D’USSÉ. Guests seen in a “dance circle/mosh pit” included Jay’s wife Beyoncé, LA Clipper Chris Paul, J. Cole and Rashida Jones. After hosting his own visitors down the hall, Timberlake and wife Jessica Biel joined the bash that went till the wee hours.