HAVING HER CAKE: Spotted front row at the Alexandre Vauthier show in Paris on Tuesday, Beth Ditto was in the mood to celebrate after completing work on her new album. Though it still doesn’t have a title, the opus is due for a May release. “I feel like I’m pregnant. ‘When are you due?’ ‘May. The baby’s due in May,’” she joked. Ditto saw the Givenchy couture presentation on Tuesday and planned to attend the Jean Paul Gaultier show. While in town, she also hoped to catch the Diane Arbus photography retrospective at the Jeu de Paume museum and eat macaroons at Ladurée. “It’s the must-eat macaroon of the season,” she declared.