This is the one day when Jennifer Lopez has the right to act like a diva: The new mom turns 39 today. Also celebrating: Broadway star Kristin Chenoweth turns 40 today (although she looks like she's 12). Anna Paquin is 26. Michael Richards of Seinfeld fame turns 59. Billionaire investor Nelson Peltz is 66. Artist Alex Katz is 81. Director Gus Van Sant turns 52. And scandal-plagued baseball star Barry Bonds is 44.