5:57 PM EDT 6/24/2012
While 50,000 audience members enjoyed the show at BBC Radio 1's Hackney Festival, show headliner, Jay-Z, had a few surprises for them on stage and off.
Jay-Z performed a series of his hits for the crowd and brought out two very special guests for two songs. Jay-Z opened the festival with Rihanna and the two performed their smash hit "Run This Town" together.
Later on in the show, Jay-Z was joined by his "Watch the Throne" tour mate, Kanye West, to perform their single "N****s in Paris." With some instruction from Jay-Z, the crowd formed a circular mosh pit, including Jay-Z's wife, Beyonce! The R&B diva rocked out with the crowd to her hubby's hit.