Jennifer Lopez really likes her own music. At one point during the housewarming party she and husband Marc Anthony threw over the weekend at their $10 million home in Hidden Hills, Calif., DJ Ruckus played an untitled new single six times in a row. “It was a bit much,” joked an attendee. “I guess she was testing it out.” Among 200 guests at the party, where Lopez and Anthony also renewed their vows, were Benny Medina, Quincy Jones, Mary J. Blige, and Brad Pitt and Angelina Jolie.