It wasn't all work for Jennifer Lopez at this year's Cannes Film Festival. On Thursday, the actress and her hubby Marc Anthony enjoyed some down time on the family's rented yacht with twins Max and Emme before the adults headed off to the amfAR Cinema Against AIDS benefit at the Hotel du Cap.Jennifer, 40, looked happy and relaxed in a blue patterned sundress as she played with 2-year-old Emme, lifting her up and showering her with kisses, much to her daughter's delight.That evening it was back to business as the star couple hit the red carpet for the annual amFAR event. Lopez, stunning in an elegant pink Roberto Cavalli gown and long, loose wavy locks, wowed the crowd before heading in to tempt the audience, which included Russell Crowe, Michelle Williams, and Mick Jagger, into spending their dollars for a good cause.With items up for auction including a gold-plated bottle of champagne, a day with former President Bill Clinton, which went for $220,000, and a flight in a fighter jet, with a winning bid of $170,000, the gala raised $6.7 million (5.36 million euros) for AIDS research.