Newly single Jennifer Lopez had another Miami birthday bash Saturday, this time at Scott Conant‘s hot spot Scarpetta. Benny Medina played host and guests included J.Lo’s mother, Lupe, sister Lynda, plus aunts and cousins. Lopez, in a short silver-and-purple sequined dress, was surprised by a cake featuring “a lion face and sparklers” and “lip-synched to Donna Summer hits,” a source said. She spent her weekend relaxing poolside with family, including twins Max and Emme. On Friday, J.Lo dined at The Forge in her first public appearance after splitting with Marc Anthony.